diff --git a/doc/images/palettes/palette_alpha.png b/doc/images/palettes/palette_alpha.png
new file mode 100644
index 0000000000..d3476a28fa
Binary files /dev/null and b/doc/images/palettes/palette_alpha.png differ
diff --git a/doc/images/palettes/palette_invalpha.png b/doc/images/palettes/palette_invalpha.png
new file mode 100644
index 0000000000..d3476a28fa
Binary files /dev/null and b/doc/images/palettes/palette_invalpha.png differ
diff --git a/examples/multithreaded/README.md b/examples/multithreaded/README.md
index a448c091aa..fb1ea0eb7f 100644
--- a/examples/multithreaded/README.md
+++ b/examples/multithreaded/README.md
@@ -94,10 +94,13 @@ This test results in the following numbers (on my AMD Ryzen5 8/16-core laptop):
 
 [comment]:RESULTS
 
-<u><b>SERIAL RESULTS:</b></u><br/>runtime, overall = 1822.3ms<br/>single runtimes = (227.7 +/- 306.8) ms<br/>speedup = 1.00x<br/>threads / available = 1 / 16<br/><br/>  
+<b>VERSION:</b> 5.0.0
+<b>BUILD MODE:</b> Release
+
+<u><b>SERIAL RESULTS:</b></u><br/>runtime, overall = 1896.0ms<br/>single runtimes = (236.9 +/- 379.1) ms<br/>speedup = 1.00x<br/>threads / available = 1 / 16<br/><br/>  
 
 <u><b>PARALLEL RESULTS:</b></u><br/>
-runtime, overall = 811.1ms<br/>single runtimes = (760.8 +/- 63.8) ms<br/>speedup = 7.50x<br/>threads / available = 8 / 16<br/><br/><b>speedup vs. serial = 2.2x</b>
+runtime, overall = 624.7ms<br/>single runtimes = (564.3 +/- 107.7) ms<br/>speedup = 7.23x<br/>threads / available = 8 / 16<br/><br/><b>speedup vs. serial = 3.0x</b>
 
 [comment]:RESULTS_END
 
diff --git a/examples/multithreaded/multithreaded.cpp b/examples/multithreaded/multithreaded.cpp
index 026c80a9e8..a0f60c9dc3 100644
--- a/examples/multithreaded/multithreaded.cpp
+++ b/examples/multithreaded/multithreaded.cpp
@@ -15,6 +15,7 @@
 #include "multithreaded_thread.h"
 #include "jkqtmath/jkqtpstatbasics.h"
 #include "jkqtpexampleapplication.h"
+#include "jkqtplotter_version.h"
 
 #define NUM_SHOWN_PLOTS 3
 #define NUM_PLOTS 8
@@ -129,7 +130,9 @@ int main(int argc, char* argv[])
                 const auto iend=md.indexOf("[comment]:RESULTS_END");
                 qDebug()<<"  istart="<<istart<<",  iend="<<iend;
                 if (istart>=0 && iend>istart) {
-                    const QByteArray newResults="[comment]:RESULTS\n\n<u><b>SERIAL RESULTS:</b></u><br/>"+ser_result.toUtf8()
+                    const QByteArray newResults="[comment]:RESULTS\n\n<b>VERSION:</b> "+QByteArray(JKQTPLOTTER_VERSION::PROJECT_VERSION)
+                                               +"\n<b>BUILD MODE:</b> "+QByteArray(JKQTPLOTTER_VERSION::PROJECT_BUILDTYPE)
+                                               +"\n\n<u><b>SERIAL RESULTS:</b></u><br/>"+ser_result.toUtf8()
                                                +"\n\n<u><b>PARALLEL RESULTS:</b></u><br/>\n"+par_result.toUtf8()+"\n\n";
                     md.replace(istart,iend-istart,newResults);
                     if (f.open(QFile::WriteOnly)) {
diff --git a/lib/jkqtcommon/jkqtpbasicimagetools.cpp b/lib/jkqtcommon/jkqtpbasicimagetools.cpp
index 9f349360c3..e2d60fe80c 100644
--- a/lib/jkqtcommon/jkqtpbasicimagetools.cpp
+++ b/lib/jkqtcommon/jkqtpbasicimagetools.cpp
@@ -40,7 +40,9 @@ const int JKQTPImageTools::NDEFAULTSTEPS = 5;
 
 QMap<int, JKQTPImageTools::LUTData > JKQTPImageTools::global_jkqtpimagetools_lutstore = JKQTPImageTools::getDefaultLUTs();
 int JKQTPImageTools::global_next_userpalette = JKQTPMathImageFIRST_REGISTERED_USER_PALETTE;
-std::mutex JKQTPImageTools::lutMutex;
+QReadWriteLock JKQTPImageTools::lutMutex;
+QStringList JKQTPImageTools::getPredefinedPalettesGlobalList = QStringList();
+QStringList JKQTPImageTools::getPredefinedPalettesMachineReadableGlobalList = QStringList();
 
 
 
@@ -2040,38 +2042,44 @@ bool JKQTPImagePlot_QPairCompareFirst(const QPair<T1, T2> &s1, const QPair<T1, T
 }
 
 QStringList JKQTPImageTools::getPredefinedPalettes()  {
-    std::lock_guard<std::mutex> lock(JKQTPImageTools::lutMutex);
-    static QStringList sl;
+    QReadLocker lock(&JKQTPImageTools::lutMutex);
 
-    if (sl.size()!=JKQTPImageTools::global_jkqtpimagetools_lutstore.size()) {
-        sl.clear();
-        for (auto it=JKQTPImageTools::global_jkqtpimagetools_lutstore.begin(); it!=JKQTPImageTools::global_jkqtpimagetools_lutstore.end(); ++it) {
-            if (it.key()>=0 && it.key()<=JKQTPMathImageLAST_POSSIBLE_REGISTERED_USER_PALETTE) {
-                if (it.value().nameT.size()!=0) sl<<it.value().nameT;
-                else if (it.value().name.size()!=0) sl<<it.value().name;
-                else sl<<QString(QObject::tr("Palette")+" #"+QString::number(it.key()));
+    if (getPredefinedPalettesGlobalList.size()!=JKQTPImageTools::global_jkqtpimagetools_lutstore.size()) {
+        lock.unlock();
+        QWriteLocker lock(&JKQTPImageTools::lutMutex);
+        if (getPredefinedPalettesGlobalList.size()!=JKQTPImageTools::global_jkqtpimagetools_lutstore.size()) {
+            getPredefinedPalettesGlobalList.clear();
+            for (auto it=JKQTPImageTools::global_jkqtpimagetools_lutstore.begin(); it!=JKQTPImageTools::global_jkqtpimagetools_lutstore.end(); ++it) {
+                if (it.key()>=0 && it.key()<=JKQTPMathImageLAST_POSSIBLE_REGISTERED_USER_PALETTE) {
+                    if (it.value().nameT.size()!=0) getPredefinedPalettesGlobalList<<it.value().nameT;
+                    else if (it.value().name.size()!=0) getPredefinedPalettesGlobalList<<it.value().name;
+                    else getPredefinedPalettesGlobalList<<QString(QObject::tr("Palette")+" #"+QString::number(it.key()));
+                }
             }
         }
     }
-    return sl;
+    return getPredefinedPalettesGlobalList;
 }
 
 
 QStringList JKQTPImageTools::getPredefinedPalettesMachineReadable()  {
-    std::lock_guard<std::mutex> lock(JKQTPImageTools::lutMutex);
-    static QStringList sl;
+    QReadLocker lock(&JKQTPImageTools::lutMutex);
 
-    if (sl.size()!=JKQTPImageTools::global_jkqtpimagetools_lutstore.size()) {
-        sl.clear();
-        for (auto it=JKQTPImageTools::global_jkqtpimagetools_lutstore.begin(); it!=JKQTPImageTools::global_jkqtpimagetools_lutstore.end(); ++it) {
-            if (it.key()>=0) {
-                if (it.value().name.size()!=0) sl<<it.value().name;
-                else if (it.value().nameT.size()!=0) sl<<it.value().nameT;
-                else sl<<QString("palette #"+QString::number(it.key()));
+    if (getPredefinedPalettesMachineReadableGlobalList.size()!=JKQTPImageTools::global_jkqtpimagetools_lutstore.size()) {
+        lock.unlock();
+        QWriteLocker lock(&JKQTPImageTools::lutMutex);
+        if (getPredefinedPalettesMachineReadableGlobalList.size()!=JKQTPImageTools::global_jkqtpimagetools_lutstore.size()) {
+            getPredefinedPalettesMachineReadableGlobalList.clear();
+            for (auto it=JKQTPImageTools::global_jkqtpimagetools_lutstore.begin(); it!=JKQTPImageTools::global_jkqtpimagetools_lutstore.end(); ++it) {
+                if (it.key()>=0) {
+                    if (it.value().name.size()!=0) getPredefinedPalettesMachineReadableGlobalList<<it.value().name;
+                    else if (it.value().nameT.size()!=0) getPredefinedPalettesMachineReadableGlobalList<<it.value().nameT;
+                    else getPredefinedPalettesMachineReadableGlobalList<<QString("palette #"+QString::number(it.key()));
+                }
             }
         }
     }
-    return sl;
+    return getPredefinedPalettesMachineReadableGlobalList;
 }
 
 
@@ -2080,7 +2088,7 @@ QStringList JKQTPImageTools::getPredefinedPalettesMachineReadable()  {
 
 QString JKQTPImageTools::JKQTPMathImageColorPalette2String(JKQTPMathImageColorPalette p)
 {
-    std::lock_guard<std::mutex> lock(JKQTPImageTools::lutMutex);
+    QReadLocker lock(&JKQTPImageTools::lutMutex);
     auto it=JKQTPImageTools::global_jkqtpimagetools_lutstore.find(p);
     if (it==JKQTPImageTools::global_jkqtpimagetools_lutstore.end()) return QString::number(static_cast<int>(p));
     else {
@@ -2091,7 +2099,7 @@ QString JKQTPImageTools::JKQTPMathImageColorPalette2String(JKQTPMathImageColorPa
 
 QString JKQTPImageTools::JKQTPMathImageColorPalette2StringHumanReadable(JKQTPMathImageColorPalette p)
 {
-    std::lock_guard<std::mutex> lock(JKQTPImageTools::lutMutex);
+    QReadLocker lock(&JKQTPImageTools::lutMutex);
     auto it=JKQTPImageTools::global_jkqtpimagetools_lutstore.find(p);
     if (it==JKQTPImageTools::global_jkqtpimagetools_lutstore.end()) return QString::number(static_cast<int>(p));
     else {
@@ -2103,7 +2111,7 @@ QString JKQTPImageTools::JKQTPMathImageColorPalette2StringHumanReadable(JKQTPMat
 
 JKQTPMathImageColorPalette JKQTPImageTools::String2JKQTPMathImageColorPalette(const QString &p)
 {
-    std::lock_guard<std::mutex> lock(JKQTPImageTools::lutMutex);
+    QReadLocker lock(&JKQTPImageTools::lutMutex);
     for (auto it=JKQTPImageTools::global_jkqtpimagetools_lutstore.begin(); it!=JKQTPImageTools::global_jkqtpimagetools_lutstore.end(); ++it) {
         if (QString::compare(p, it.value().name, Qt::CaseInsensitive)==0) {
             return static_cast<JKQTPMathImageColorPalette>(it.key());
@@ -2234,7 +2242,7 @@ QVector<QColor> JKQTPImageTools::getColorsforPalette(JKQTPMathImageColorPalette
 
 int JKQTPImageTools::registerPalette(const QString &name, const JKQTPImageTools::LUTType &paletteLut, const QString &nameT)
 {
-    std::lock_guard<std::mutex> lock(JKQTPImageTools::lutMutex);
+    QWriteLocker lock(&JKQTPImageTools::lutMutex);
     int id=JKQTPImageTools::global_next_userpalette++;
     JKQTPImageTools::global_jkqtpimagetools_lutstore[id].name=name;
     JKQTPImageTools::global_jkqtpimagetools_lutstore[id].nameT=((nameT.size()>0)?nameT:name);
diff --git a/lib/jkqtcommon/jkqtpbasicimagetools.h b/lib/jkqtcommon/jkqtpbasicimagetools.h
index ac32c11ac3..f73528e6fe 100644
--- a/lib/jkqtcommon/jkqtpbasicimagetools.h
+++ b/lib/jkqtcommon/jkqtpbasicimagetools.h
@@ -28,7 +28,7 @@
 #include <cfloat>
 #include <stdint.h>
 #include <QColor>
-#include <mutex>
+#include <QReadWriteLock>
 #include <vector>
 #include "jkqtcommon/jkqtcommon_imexport.h"
 #include "jkqtcommon/jkqtpmathtools.h"
@@ -341,16 +341,16 @@ enum JKQTPMathImageColorPalette {
     JKQTPMathImagePastel2_STEP, /*!< \image{inline} html palettes/palette_pastel2_step.png */
     JKQTPMathImageSet1_STEP, /*!< \image{inline} html palettes/palette_set1_step.png */
     JKQTPMathImageSet2_STEP, /*!< \image{inline} html palettes/palette_set2_step.png */
+    JKQTPMathImageALPHA, /*!< \brief special palette with increasing alpha values */
+    JKQTPMathImageINVERTED_ALPHA, /*!< \brief special palette with decreasing alpha values */
 
     JKQTPMathImagePREDEFINED_PALETTES_COUNT, /*!< \brief the number of predefined palettes */
 
     JKQTPMathImageUSER_PALETTE=65000, /*!< \brief special value for JKQTPImageTools::array2image(), which signals the usage of a provided user-defined palette */
 
-    JKQTPMathImageALPHA=JKQTPMathImageUSER_PALETTE-2, /*!< \brief special palette with increasing alpha values */
-    JKQTPMathImageINVERTED_ALPHA=JKQTPMathImageUSER_PALETTE-1, /*!< \brief special palette with decreasing alpha values */
 
     JKQTPMathImageFIRST_REGISTERED_USER_PALETTE=JKQTPMathImagePREDEFINED_PALETTES_COUNT,  /*!< \brief the ID of the first user-defined paletted, registered with JKQTPImageTools::registerPalette() or JKQTPImageTools::registerPalettesFromFile() */
-    JKQTPMathImageLAST_POSSIBLE_REGISTERED_USER_PALETTE=JKQTPMathImageUSER_PALETTE-10,  /*!< \brief the ID of the first user-defined paletted, registered with JKQTPImageTools::registerPalette() or JKQTPImageTools::registerPalettesFromFile() */
+    JKQTPMathImageLAST_POSSIBLE_REGISTERED_USER_PALETTE=JKQTPMathImageUSER_PALETTE-10,  /*!< \brief the ID of the last user-defined paletted, registered with JKQTPImageTools::registerPalette() or JKQTPImageTools::registerPalettesFromFile() */
 };
 
 
@@ -664,8 +664,12 @@ struct JKQTPImageTools {
             \see registerPalette() registerPalettesFromFile()
             */
         static JKQTCOMMON_LIB_EXPORT int global_next_userpalette;
-        /** \brief Mutex to protect global_jkqtpimagetools_lutstore and global_next_userpalette */
-        static JKQTCOMMON_LIB_EXPORT std::mutex lutMutex;
+        /** \brief storage for the palette names in getPredefinedPalettes() \internal  */
+        static JKQTCOMMON_LIB_EXPORT QStringList getPredefinedPalettesGlobalList;
+        /** \brief storage for the palette names in etPredefinedPalettesMachineReadable() \internal  */
+        static JKQTCOMMON_LIB_EXPORT QStringList getPredefinedPalettesMachineReadableGlobalList;
+        /** \brief Mutex to protect global_jkqtpimagetools_lutstore, getPredefinedPalettesGlobalList, getPredefinedPalettesMachineReadableGlobalList and global_next_userpalette */
+        static JKQTCOMMON_LIB_EXPORT QReadWriteLock lutMutex;
 
 
         /*! \brief returns data of the default LUTs, used to initialize global_jkqtpimagetools_lutstore
diff --git a/lib/jkqtcommon/jkqtpconcurrencytools.h b/lib/jkqtcommon/jkqtpconcurrencytools.h
index a4e1e31e1c..b1f8cf8238 100644
--- a/lib/jkqtcommon/jkqtpconcurrencytools.h
+++ b/lib/jkqtcommon/jkqtpconcurrencytools.h
@@ -25,6 +25,9 @@
 #define JKQTPCONCURRENCYTOOLS_H
 
 #include "jkqtcommon/jkqtcommon_imexport.h"
+#include <QReadWriteLock>
+#include <QReadLocker>
+#include <QWriteLocker>
 #include <mutex>
 
 /** \brief template class that wraps any datatype and combines it with a mutex, exposes the lock()/unlock()
@@ -37,9 +40,39 @@ template <class T>
 class JKQTPSynchronized {
 public:
     /** \brief Mutex used by this temmplate */
-    typedef std::mutex MutexType;
-    /** \brief type of a lock_guard for a JKQTPSynchronized<T> */
-    typedef std::lock_guard<JKQTPSynchronized<T> > Locker;
+    typedef QReadWriteLock MutexType;
+
+    /** \brief type of AdoptLock tag, which is used in ReadLocker and WriteLocker to adopt a pre-locked JKQTPSynchronized<T> */
+    struct AdoptLockType { explicit AdoptLockType() = default; };
+    /** \brief tag, which is used in ReadLocker and WriteLocker to adopt a pre-locked JKQTPSynchronized<T> */
+    static constexpr AdoptLockType	AdoptLock { };
+
+    /** \brief type of a lock_guard for a JKQTPSynchronized<T> for reading */
+    class ReadLocker
+    {
+    public:
+        inline ReadLocker(const JKQTPSynchronized<T> &sync) noexcept: m_sync(sync) { m_sync.lockForRead(); };
+        inline ReadLocker(const JKQTPSynchronized<T> &sync, AdoptLockType) noexcept : m_sync(sync) { };
+        inline ~ReadLocker() { m_sync.unlock(); }
+    private:
+        Q_DISABLE_COPY(ReadLocker)
+        const JKQTPSynchronized<T> &m_sync;
+    };
+
+    /** \brief type of a lock_guard for a JKQTPSynchronized<T> for writing */
+    class WriteLocker
+    {
+    public:
+        inline WriteLocker(JKQTPSynchronized<T> &sync) noexcept: m_sync(sync) { m_sync.lockForWrite(); };
+        inline WriteLocker(JKQTPSynchronized<T> &sync, AdoptLockType) noexcept : m_sync(sync) { };
+        inline ~WriteLocker() { m_sync.unlock(); }
+    private:
+        Q_DISABLE_COPY(WriteLocker)
+        JKQTPSynchronized<T> &m_sync;
+    };
+
+    /** \brief type of a lock_guard for a JKQTPSynchronized<T> for writing */
+    typedef JKQTPSynchronized<T>::WriteLocker Locker;
     /** \brief contained data type T */
     typedef T data_type;
     /** \brief default constructor, the internal data is default-initialized */
@@ -59,18 +92,32 @@ public:
         m_data=std::move(other.m_data);
     }
 
-    /** \brief locks the internal mutex until unlock() is called,
+    /** \brief locks the internal mutex for writing, until unlock() is called
      *
-     *  \note Use Locker instances to actually lock, using a RAII-idiom, as this is safer than doing this by hand!
+     *  \note Use WriteLocker or Locker instances to actually lock, using a RAII-idiom, as this is safer than doing this by hand!
      */
-    inline void lock() {
-        m_mutex.lock();
+    inline void lock() const {
+        lockForWrite();
     }
-    /** \brief unlocks the internal mutex from a previous lock() call
+    /** \brief locks the internal mutex for writing, until unlock() is called
+     *
+     *  \note Use WriteLocker or Locker instances to actually lock, using a RAII-idiom, as this is safer than doing this by hand!
+     */
+    inline void lockForWrite() const {
+        m_mutex.lockForWrite();
+    }
+    /** \brief locks the internal mutex for writing, until unlock() is called
+     *
+     *  \note Use WriteLocker or Locker instances to actually lock, using a RAII-idiom, as this is safer than doing this by hand!
+     */
+    inline void lockForRead() const {
+        m_mutex.lockForRead();
+    }
+    /** \brief unlocks the internal mutex from a previous lock(), lockForWrite() or lockForRead() call
      *
      *  \note Use Locker instances to actually lock, using a RAII-idiom, as this is safer than doing this by hand!
      */
-    inline void unlock() {
+    inline void unlock() const {
         m_mutex.unlock();
     }
     /** \brief assign a value to the internal data storage, <b>not thread-safe.</b>
@@ -130,7 +177,7 @@ public:
     /** \brief returns the value in the internal data storage, <b>thread-safe</b>.
      */
     inline T get_safe() const {
-        Locker lck(m_mutex);
+        ReadLocker lck(this);
         return m_data;
     }
 
diff --git a/lib/jkqtcommon/jkqtpdrawingtools.cpp b/lib/jkqtcommon/jkqtpdrawingtools.cpp
index c85cae705c..0de9c43d4d 100644
--- a/lib/jkqtcommon/jkqtpdrawingtools.cpp
+++ b/lib/jkqtcommon/jkqtpdrawingtools.cpp
@@ -556,14 +556,14 @@ JKQTPSynchronized<QVector<JKQTPCustomGraphSymbolFunctor> > JKQTPlotterDrawingToo
 
 JKQTPGraphSymbols JKQTPRegisterCustomGraphSymbol(JKQTPCustomGraphSymbolFunctor&& f)
 {
-    JKQTPlotterDrawingTools::SymbolsLocker lock(JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore);
+    JKQTPlotterDrawingTools::SymbolsWriteLocker lock(JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore);
     JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore->push_back(std::move(f));
     return static_cast<JKQTPGraphSymbols>(static_cast<uint64_t>(JKQTPFirstCustomSymbol)+static_cast<uint64_t>(JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore->size()-1));
 }
 
 JKQTPGraphSymbols JKQTPRegisterCustomGraphSymbol(const JKQTPCustomGraphSymbolFunctor& f)
 {
-    JKQTPlotterDrawingTools::SymbolsLocker lock(JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore);
+    JKQTPlotterDrawingTools::SymbolsWriteLocker lock(JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore);
     JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore->push_back(f);
     return static_cast<JKQTPGraphSymbols>(static_cast<uint64_t>(JKQTPFirstCustomSymbol)+static_cast<uint64_t>(JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore->size()-1));
 }
diff --git a/lib/jkqtcommon/jkqtpdrawingtools.h b/lib/jkqtcommon/jkqtpdrawingtools.h
index 2910710926..3046e8740a 100644
--- a/lib/jkqtcommon/jkqtpdrawingtools.h
+++ b/lib/jkqtcommon/jkqtpdrawingtools.h
@@ -87,7 +87,8 @@ struct JKQTPlotterDrawingTools {
      * \internal
      */
     static JKQTCOMMON_LIB_EXPORT JKQTPSynchronized<QVector<JKQTPCustomGraphSymbolFunctor> > JKQTPCustomGraphSymbolStore;
-    typedef JKQTPSynchronized<QVector<JKQTPCustomGraphSymbolFunctor> >::Locker SymbolsLocker;
+    typedef JKQTPSynchronized<QVector<JKQTPCustomGraphSymbolFunctor> >::ReadLocker SymbolsReadLocker;
+    typedef JKQTPSynchronized<QVector<JKQTPCustomGraphSymbolFunctor> >::WriteLocker SymbolsWriteLocker;
 };
 
 
@@ -982,7 +983,7 @@ inline void JKQTPPlotSymbol(TPainter& painter, double x, double y, JKQTPGraphSym
         painter.drawPath(path);
     }
     if (symbol>=JKQTPFirstCustomSymbol) {
-        JKQTPlotterDrawingTools::SymbolsLocker lock(JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore);
+        JKQTPlotterDrawingTools::SymbolsReadLocker lock(JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore);
         const int idx(static_cast<int>(symbol-JKQTPFirstCustomSymbol));
         if (idx>=0 && idx<JKQTPlotterDrawingTools::JKQTPCustomGraphSymbolStore->size()) {
             painter.setPen(p);
diff --git a/lib/jkqtmathtext/jkqtmathtexttools.cpp b/lib/jkqtmathtext/jkqtmathtexttools.cpp
index 4b50daf5a8..56da2c014d 100644
--- a/lib/jkqtmathtext/jkqtmathtexttools.cpp
+++ b/lib/jkqtmathtext/jkqtmathtexttools.cpp
@@ -29,22 +29,21 @@
 #include <QFontInfo>
 #include <QApplication>
 #include <QFont>
+#include <mutex>
 
 
 void initJKQTMathTextResources()
 {
-    static bool initialized=false;
-    static std::mutex mutex_initialized;
-    std::lock_guard<std::mutex> lock(mutex_initialized);
-    if (!initialized) {
-#ifdef JKQTMATHTEXT_COMPILED_WITH_XITS
-        Q_INIT_RESOURCE(xits);
-#endif
-#ifdef JKQTMATHTEXT_COMPILED_WITH_FIRAMATH
-        Q_INIT_RESOURCE(firamath);
-#endif
-        initialized=true;
-    }
+    static std::once_flag flag;
+    std::call_once(flag, []() {
+            #ifdef JKQTMATHTEXT_COMPILED_WITH_XITS
+                    Q_INIT_RESOURCE(xits);
+            #endif
+            #ifdef JKQTMATHTEXT_COMPILED_WITH_FIRAMATH
+                    Q_INIT_RESOURCE(firamath);
+            #endif
+        }
+    );
 }
 
 JKQTMathTextFontSpecifier::JKQTMathTextFontSpecifier():
@@ -234,6 +233,8 @@ bool JKQTMathTextFontSpecifier::hasFallbackSymbolFontName() const
 JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getXITSFamilies()
 {
     initJKQTMathTextResources();
+
+
 #if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
     QFontDatabase fdb;
     const auto fontFamilies=fdb.families();
@@ -249,9 +250,7 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getXITSFamilies()
         if (QFile::exists(":/JKQTMathText/fonts/xits-regular.otf")) { QFontDatabase::addApplicationFont(":/JKQTMathText/fonts/xits-regular.otf"); }
     }
 
-    static JKQTMathTextFontSpecifier fontSpec;
-    static std::mutex fontSpecMutex;
-    std::lock_guard<std::mutex> lock(fontSpecMutex);
+     static JKQTMathTextFontSpecifier fontSpec;
     if (fontSpec.m_fontName.isEmpty() && fontSpec.m_mathFontName.isEmpty()) {
         fontSpec.m_transformOnOutput=false;
         for (int i=0; i<fontFamilies.size(); i++) {
@@ -277,22 +276,20 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getXITSFamilies()
 
 JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getASANAFamilies()
 {
-    initJKQTMathTextResources();
-#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
-    QFontDatabase fdb;
-    const auto fontFamilies=fdb.families();
-#else
-    const auto fontFamilies=QFontDatabase::families();
-#endif
-    if (!fontFamilies.contains("Asana") && !fontFamilies.contains("Asana Math")) {
-        if (QFile::exists(":/JKQTMathText/fonts/asana-math.otf")) { /*i=*/QFontDatabase::addApplicationFont(":/JKQTMathText/fonts/asana-math.otf"); }
-    }
+    static JKQTMathTextFontSpecifier fontSpec=[]() -> JKQTMathTextFontSpecifier {
+        initJKQTMathTextResources();
+    #if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
+        QFontDatabase fdb;
+        const auto fontFamilies=fdb.families();
+    #else
+        const auto fontFamilies=QFontDatabase::families();
+    #endif
+        if (!fontFamilies.contains("Asana") && !fontFamilies.contains("Asana Math")) {
+            if (QFile::exists(":/JKQTMathText/fonts/asana-math.otf")) { /*i=*/QFontDatabase::addApplicationFont(":/JKQTMathText/fonts/asana-math.otf"); }
+        }
 
 
-    static JKQTMathTextFontSpecifier fontSpec;
-    static std::mutex fontSpecMutex;
-    std::lock_guard<std::mutex> lock(fontSpecMutex);
-    if (fontSpec.m_fontName.isEmpty() && fontSpec.m_mathFontName.isEmpty()) {
+        JKQTMathTextFontSpecifier fontSpec;
         fontSpec.m_transformOnOutput=false;
         for (int i=0; i<fontFamilies.size(); i++) {
             if (fontFamilies.at(i).contains("Asana Math")) {
@@ -310,22 +307,19 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getASANAFamilies()
             fontSpec.m_fontName=fontSpec.m_mathFontName;
         }
         fontSpec.m_fallbackSymbolFont=fontSpec.m_mathFontName;
-    }
-
-
+        return fontSpec;
+    }();
     return fontSpec;
 }
 
 JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getSTIXFamilies()
 {
-    initJKQTMathTextResources();
-    static QStringList mathNames{"STIX Two Math", "STIX Math", "STIX Two Math Standard", "STIX Math Standard"};
-    static QStringList textNames{"STIX", "STIXGeneral", "STIX General"};
+    static JKQTMathTextFontSpecifier fontSpec=[]() -> JKQTMathTextFontSpecifier {
+        initJKQTMathTextResources();
+        static QStringList mathNames{"STIX Two Math", "STIX Math", "STIX Two Math Standard", "STIX Math Standard"};
+        static QStringList textNames{"STIX", "STIXGeneral", "STIX General"};
 
-    static JKQTMathTextFontSpecifier fontSpec;
-    static std::mutex fontSpecMutex;
-    std::lock_guard<std::mutex> lock(fontSpecMutex);
-    if (fontSpec.m_fontName.isEmpty() && fontSpec.m_mathFontName.isEmpty()) {
+        JKQTMathTextFontSpecifier fontSpec;
         fontSpec.m_transformOnOutput=false;
 #if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
         QFontDatabase fdb;
@@ -365,27 +359,26 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getSTIXFamilies()
             fontSpec.m_fontName=fontSpec.m_mathFontName;
         }
         fontSpec.m_fallbackSymbolFont=fontSpec.m_mathFontName;
-    }
+        return fontSpec;
+    }();
     return fontSpec;
 }
 
 JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getFIRAFamilies()
 {
-    initJKQTMathTextResources();
-#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
-    QFontDatabase fdb;
-    const auto fontFamilies=fdb.families();
-#else
-    const auto fontFamilies=QFontDatabase::families();
-#endif
-    if (!fontFamilies.contains("Fira Math")) {
-        if (QFile::exists(":/JKQTMathText/fonts/FiraMath-Regular.otf")) { QFontDatabase::addApplicationFont(":/JKQTMathText/fonts/FiraMath-Regular.otf"); }
-    }
+    static JKQTMathTextFontSpecifier fontSpec=[]() -> JKQTMathTextFontSpecifier {
+        initJKQTMathTextResources();
+    #if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
+        QFontDatabase fdb;
+        const auto fontFamilies=fdb.families();
+    #else
+        const auto fontFamilies=QFontDatabase::families();
+    #endif
+        if (!fontFamilies.contains("Fira Math")) {
+            if (QFile::exists(":/JKQTMathText/fonts/FiraMath-Regular.otf")) { QFontDatabase::addApplicationFont(":/JKQTMathText/fonts/FiraMath-Regular.otf"); }
+        }
 
-    static JKQTMathTextFontSpecifier fontSpec;
-    static std::mutex fontSpecMutex;
-    std::lock_guard<std::mutex> lock(fontSpecMutex);
-    if (fontSpec.m_fontName.isEmpty() && fontSpec.m_mathFontName.isEmpty()) {
+        JKQTMathTextFontSpecifier fontSpec;
         fontSpec.m_transformOnOutput=false;
         for (int i=0; i<fontFamilies.size(); i++) {
             if (fontFamilies.at(i).contains("Fira Math")) {
@@ -405,17 +398,16 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getFIRAFamilies()
             fontSpec.m_fontName=fontSpec.m_mathFontName;
         }
         fontSpec.m_fallbackSymbolFont=fontSpec.m_mathFontName;
-    }
+        return fontSpec;
+    }();
 
     return fontSpec;
 }
 
 JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getAppFontFamilies()
 {
-    static JKQTMathTextFontSpecifier fontSpec;
-    static std::mutex fontSpecMutex;
-    std::lock_guard<std::mutex> lock(fontSpecMutex);
-    if (fontSpec.m_fontName.isEmpty() && fontSpec.m_mathFontName.isEmpty()) {
+    static JKQTMathTextFontSpecifier fontSpec=[]() -> JKQTMathTextFontSpecifier {
+        JKQTMathTextFontSpecifier fontSpec;
 #if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
         QFontDatabase fdb;
         const auto fontFamilies=fdb.families();
@@ -448,16 +440,14 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getAppFontFamilies()
                 if (xits.hasMathFontName()) fontSpec.m_mathFontName=xits.mathFontName();
             }
         }
-    }
+        return fontSpec;
+    }();
     return fontSpec;
 }
 
 JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getAppFontSFFamilies()
 {
-    static JKQTMathTextFontSpecifier fontSpec;
-    static std::mutex fontSpecMutex;
-    std::lock_guard<std::mutex> lock(fontSpecMutex);
-    if (fontSpec.m_fontName.isEmpty() && fontSpec.m_mathFontName.isEmpty()) {
+    static JKQTMathTextFontSpecifier fontSpec=[]() -> JKQTMathTextFontSpecifier {
         const QFont f=QGuiApplication::font().family();
         QFont testFnt;
         if (f.styleHint()==QFont::SansSerif) {
@@ -467,7 +457,8 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getAppFontSFFamilies()
             testFnt.setStyleHint(QFont::StyleHint::SansSerif);
             fontSpec.m_fontName=fontSpec.m_mathFontName=testFnt.defaultFamily();
         }
-    }
+        return fontSpec;
+    }();
     return fontSpec;
 }
 
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextboxinstructionnode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtextboxinstructionnode.cpp
index b05b256018..74b14ac266 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextboxinstructionnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextboxinstructionnode.cpp
@@ -41,7 +41,7 @@
 JKQTMathTextBoxInstructionNode::JKQTMathTextBoxInstructionNode(JKQTMathText* _parent, const QString& name, JKQTMathTextNode* child, const QStringList& parameters):
     JKQTMathTextInstruction1Node(_parent, name, child, parameters)
 {
-    fillInstructions();
+
 }
 
 JKQTMathTextBoxInstructionNode::~JKQTMathTextBoxInstructionNode() {
@@ -56,7 +56,7 @@ QString JKQTMathTextBoxInstructionNode::getTypeName() const
 JKQTMathTextNodeSize JKQTMathTextBoxInstructionNode::getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv) const {
     JKQTMathTextEnvironment ev=currentEv;
 
-    const auto& inst=instructions.value(getInstructionName());
+    const auto& inst=instructions().value(getInstructionName());
     inst.modifier(ev, getParameters());
     const QPen p=inst.pen(ev, getParameters(), parentMathText);
     const QBrush b=inst.brush(ev, getParameters(), parentMathText);
@@ -77,7 +77,7 @@ double JKQTMathTextBoxInstructionNode::draw(QPainter& painter, double x, double
     doDrawBoxes(painter, x, y, currentEv);
     JKQTMathTextEnvironment ev=currentEv;
 
-    const auto& inst=instructions.value(getInstructionName());
+    const auto& inst=instructions().value(getInstructionName());
     inst.modifier(ev, getParameters());
     const QPen p=inst.pen(ev, getParameters(), parentMathText);
     const QBrush b=inst.brush(ev, getParameters(), parentMathText);
@@ -111,8 +111,8 @@ double JKQTMathTextBoxInstructionNode::draw(QPainter& painter, double x, double
 
 bool JKQTMathTextBoxInstructionNode::toHtml(QString &html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const {
     JKQTMathTextEnvironment ev=currentEv;
-    fillInstructions();
-    const auto& inst=instructions.value(getInstructionName());
+
+    const auto& inst=instructions().value(getInstructionName());
     inst.modifier(ev, getParameters());
     const QPen p=inst.pen(ev, getParameters(), parentMathText);
     const QBrush b=inst.brush(ev, getParameters(), parentMathText);
@@ -140,174 +140,172 @@ bool JKQTMathTextBoxInstructionNode::toHtml(QString &html, JKQTMathTextEnvironme
 
 bool JKQTMathTextBoxInstructionNode::supportsInstructionName(const QString &instructionName)
 {
-    fillInstructions();
-    return instructions.contains(instructionName);
+    return instructions().contains(instructionName);
 }
 
 size_t JKQTMathTextBoxInstructionNode::countParametersOfInstruction(const QString &instructionName)
 {
-    fillInstructions();
-    if (instructions.contains(instructionName)) return instructions[instructionName].NParams;
+    if (instructions().contains(instructionName)) return instructions()[instructionName].NParams;
     return 0;
 }
 
 void JKQTMathTextBoxInstructionNode::modifyInMathEnvironment(const QString &instructionName, bool &insideMath, bool& insideMathTextStyle, const QStringList& params)
 {
-    fillInstructions();
-    if (instructions.contains(instructionName)) {
+
+    if (instructions().contains(instructionName)) {
         JKQTMathTextEnvironment ev;
         ev.insideMath=insideMath;
         ev.insideMathUseTextStyle=insideMathTextStyle;
-        instructions[instructionName].modifier(ev, params);
+        instructions()[instructionName].modifier(ev, params);
         insideMath=ev.insideMath;
         insideMathTextStyle=ev.insideMathUseTextStyle;
     }
 }
 
 
-QHash<QString, JKQTMathTextBoxInstructionNode::InstructionProperties> JKQTMathTextBoxInstructionNode::instructions;
+const QHash<QString, JKQTMathTextBoxInstructionNode::InstructionProperties>& JKQTMathTextBoxInstructionNode::instructions() {
+    static QHash<QString, JKQTMathTextBoxInstructionNode::InstructionProperties> table=[](){
+        QHash<QString, JKQTMathTextBoxInstructionNode::InstructionProperties> instructions;
 
-void JKQTMathTextBoxInstructionNode::fillInstructions()
-{
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (instructions.size()>0) return;
-
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                InstructionProperties::DefaultPen,
-                                InstructionProperties::NoBrush,
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/0);
-        instructions["fbox"] = i;
-        instructions["framebox"] = i;
-        instructions["boxed"] = i;
-        instructions["framed"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                InstructionProperties::DefaultPen,
-                                InstructionProperties::NoBrush,
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/0);
-        i.doubleLine=true;
-        instructions["doublebox"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                InstructionProperties::DefaultPen,
-                                InstructionProperties::NoBrush,
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/0);
-        i.roundingFactor=0.7;
-        instructions["ovalbox"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
-                                    QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
-                                    p.setWidthF(p.widthF()*1.5);
-                                    return p;
-                                },
-                                InstructionProperties::NoBrush,
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/0);
-        i.roundingFactor=0.8;
-        instructions["Ovalbox"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                InstructionProperties::DefaultPen,
-                                InstructionProperties::NoBrush,
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/0);
-        i.roundingFactor=0.7;
-        i.doubleLine=true;
-        instructions["ovaldoublebox"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
-                                    QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
-                                    p.setColor(jkqtp_String2QColor(parameters.value(0, p.color().name())));
-                                    return p;
-                                },
-                                InstructionProperties::NoBrush,
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/1);
-        instructions["colorbox"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
-                                    QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
-                                    p.setStyle(Qt::DashLine);
-                                    return p;
-                                },
-                                InstructionProperties::NoBrush,
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/0);
-        instructions["dashbox"] = i;
-        instructions["dashedbox"] = i;
-        instructions["dbox"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
-                                    QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
-                                    p.setStyle(Qt::DotLine);
-                                    return p;
-                                },
-                                InstructionProperties::NoBrush,
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/0);
-        instructions["dottedbox"] = i;
-        instructions["dotbox"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                InstructionProperties::NoPen,
-                                [](JKQTMathTextEnvironment& /*ev*/, const QStringList& parameters, JKQTMathText* /*parent*/){
-                                    return QBrush(jkqtp_String2QColor(parameters.value(0, QColor(Qt::transparent).name())), Qt::SolidPattern);
-                                },
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/1);
-        instructions["shaded"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                InstructionProperties::NoPen,
-                                [](JKQTMathTextEnvironment& /*ev*/, const QStringList& parameters, JKQTMathText* /*parent*/){
-                                    return QBrush(jkqtp_String2QColor(parameters.value(0, QColor(Qt::transparent).name())), Qt::SolidPattern);
-                                },
-                                0,
-                                /*Nparams=*/1);
-        instructions["snugshade"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                InstructionProperties::DefaultPen,
-                                InstructionProperties::NoBrush,
-                                0,
-                                /*Nparams=*/0);
-        instructions["snugbox"] = i;
-    }
-    {
-        InstructionProperties i(InstructionProperties::NoModification,
-                                [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
-                                    QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
-                                    p.setColor(jkqtp_String2QColor(parameters.value(0, p.color().name())));
-                                    return p;
-                                },
-                                [](JKQTMathTextEnvironment& /*ev*/, const QStringList& parameters, JKQTMathText* /*parent*/){
-                                    return QBrush(jkqtp_String2QColor(parameters.value(1, QColor(Qt::transparent).name())), Qt::SolidPattern);
-                                },
-                                InstructionProperties::DefaultPadding,
-                                /*Nparams=*/2);
-        instructions["fcolorbox"] = i;
-    }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    InstructionProperties::DefaultPen,
+                                    InstructionProperties::NoBrush,
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/0);
+            instructions["fbox"] = i;
+            instructions["framebox"] = i;
+            instructions["boxed"] = i;
+            instructions["framed"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    InstructionProperties::DefaultPen,
+                                    InstructionProperties::NoBrush,
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/0);
+            i.doubleLine=true;
+            instructions["doublebox"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    InstructionProperties::DefaultPen,
+                                    InstructionProperties::NoBrush,
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/0);
+            i.roundingFactor=0.7;
+            instructions["ovalbox"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
+                                        QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
+                                        p.setWidthF(p.widthF()*1.5);
+                                        return p;
+                                    },
+                                    InstructionProperties::NoBrush,
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/0);
+            i.roundingFactor=0.8;
+            instructions["Ovalbox"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    InstructionProperties::DefaultPen,
+                                    InstructionProperties::NoBrush,
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/0);
+            i.roundingFactor=0.7;
+            i.doubleLine=true;
+            instructions["ovaldoublebox"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
+                                        QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
+                                        p.setColor(jkqtp_String2QColor(parameters.value(0, p.color().name())));
+                                        return p;
+                                    },
+                                    InstructionProperties::NoBrush,
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/1);
+            instructions["colorbox"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
+                                        QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
+                                        p.setStyle(Qt::DashLine);
+                                        return p;
+                                    },
+                                    InstructionProperties::NoBrush,
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/0);
+            instructions["dashbox"] = i;
+            instructions["dashedbox"] = i;
+            instructions["dbox"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
+                                        QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
+                                        p.setStyle(Qt::DotLine);
+                                        return p;
+                                    },
+                                    InstructionProperties::NoBrush,
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/0);
+            instructions["dottedbox"] = i;
+            instructions["dotbox"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    InstructionProperties::NoPen,
+                                    [](JKQTMathTextEnvironment& /*ev*/, const QStringList& parameters, JKQTMathText* /*parent*/){
+                                        return QBrush(jkqtp_String2QColor(parameters.value(0, QColor(Qt::transparent).name())), Qt::SolidPattern);
+                                    },
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/1);
+            instructions["shaded"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    InstructionProperties::NoPen,
+                                    [](JKQTMathTextEnvironment& /*ev*/, const QStringList& parameters, JKQTMathText* /*parent*/){
+                                        return QBrush(jkqtp_String2QColor(parameters.value(0, QColor(Qt::transparent).name())), Qt::SolidPattern);
+                                    },
+                                    0,
+                                    /*Nparams=*/1);
+            instructions["snugshade"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    InstructionProperties::DefaultPen,
+                                    InstructionProperties::NoBrush,
+                                    0,
+                                    /*Nparams=*/0);
+            instructions["snugbox"] = i;
+        }
+        {
+            InstructionProperties i(InstructionProperties::NoModification,
+                                    [](JKQTMathTextEnvironment& ev, const QStringList& parameters, JKQTMathText* parent){
+                                        QPen p=InstructionProperties::DefaultPen(ev, parameters, parent);
+                                        p.setColor(jkqtp_String2QColor(parameters.value(0, p.color().name())));
+                                        return p;
+                                    },
+                                    [](JKQTMathTextEnvironment& /*ev*/, const QStringList& parameters, JKQTMathText* /*parent*/){
+                                        return QBrush(jkqtp_String2QColor(parameters.value(1, QColor(Qt::transparent).name())), Qt::SolidPattern);
+                                    },
+                                    InstructionProperties::DefaultPadding,
+                                    /*Nparams=*/2);
+            instructions["fcolorbox"] = i;
+        }
+        return instructions;
+    }();
+    return table;
 }
 
+
 JKQTMathTextBoxInstructionNode::InstructionProperties::ModifyEnvironmentFunctor JKQTMathTextBoxInstructionNode::InstructionProperties::NoModification=
         [](JKQTMathTextEnvironment& /*ev*/, const QStringList& /*parameters*/){};
 
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextboxinstructionnode.h b/lib/jkqtmathtext/nodes/jkqtmathtextboxinstructionnode.h
index cfa069c223..e183b5180a 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextboxinstructionnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextboxinstructionnode.h
@@ -106,13 +106,11 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextBoxInstructionNode: public JKQTMathTex
             double roundingFactor;
         };
 
-        /** \brief fills instructions
+        /** \brief defines all implemented instructions in this node
          *
          *  \note this is the customization point for new instructions!
          */
-        static void fillInstructions();
-        /** \brief defines all implemented instructions in this node */
-        static QHash<QString, InstructionProperties> instructions;
+        static const QHash<QString, InstructionProperties>& instructions();
 };
 
 
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextdecoratednode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtextdecoratednode.cpp
index d32af005f4..069cddcb5d 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextdecoratednode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextdecoratednode.cpp
@@ -108,14 +108,12 @@ QString JKQTMathTextDecoratedNode::DecorationType2String(JKQTMathTextDecoratedNo
 
 JKQTMathTextDecoratedNode::DecorationType JKQTMathTextDecoratedNode::InstructionName2DecorationType(const QString &mode)
 {
-    fillInstructions();
-    return instructions[mode];
+    return instructions()[mode];
 }
 
 bool JKQTMathTextDecoratedNode::supportsInstructionName(const QString &instructionName)
 {
-    fillInstructions();
-    return instructions.contains(instructionName);
+    return instructions().contains(instructionName);
 }
 
 
@@ -168,64 +166,64 @@ JKQTMathTextNodeSize JKQTMathTextDecoratedNode::getSizeInternal(QPainter& painte
     return s;
 }
 
-QHash<QString, JKQTMathTextDecoratedNode::DecorationType> JKQTMathTextDecoratedNode::instructions;
+const QHash<QString, JKQTMathTextDecoratedNode::DecorationType>& JKQTMathTextDecoratedNode::instructions() {
+    static QHash<QString, JKQTMathTextDecoratedNode::DecorationType> table =[](){
+        QHash<QString, JKQTMathTextDecoratedNode::DecorationType> instructions;
 
-void JKQTMathTextDecoratedNode::fillInstructions()
-{
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (instructions.size()>0) return;
+        instructions["vec"]=MTDvec;
+        instructions["overline"]=MTDoverline;
+        instructions["oline"]=MTDoverline;
+        instructions["ol"]=MTDoverline;
+        instructions["underline"]=MTDunderline;
+        instructions["uline"]=MTDunderline;
+        instructions["ul"]=MTDunderline;
+        instructions["dashuline"]=MTDunderlineDashed;
+        instructions["dotuline"]=MTDunderlineDotted;
+        instructions["uuline"]=MTDdoubleunderline;
+        instructions["uul"]=MTDdoubleunderline;
+        instructions["ooline"]=MTDdoubleoverline;
+        instructions["ool"]=MTDdoubleoverline;
+        instructions["arrow"]=MTDarrow;
+        instructions["overrightarrow"]=MTDarrow;
+        instructions["overarrow"]=MTDarrow;
+        instructions["hat"]=MTDhat;
+        instructions["^"]=MTDhat;
+        instructions["widehat"]=MTDwidehat;
+        instructions["check"]=MTDcheck;
+        instructions["v"]=MTDcheck;
+        instructions["widecheck"]=MTDwidecheck;
+        instructions["bar"]=MTDbar;
+        instructions["="]=MTDbar;
+        instructions["dot"]=MTDdot;
+        instructions["."]=MTDdot;
+        instructions["ocirc"]=MTDocirc;
+        instructions["tilde"]=MTDtilde;
+        instructions["~"]=MTDtilde;
+        instructions["acute"]=MTDacute;
+        instructions["'"]=MTDacute;
+        instructions["grave"]=MTDgrave;
+        instructions["`"]=MTDgrave;
+        instructions["breve"]=MTDbreve;
+        instructions["u"]=MTDbreve;
+        instructions["widetilde"]=MTDwidetilde;
+        instructions["ddot"]=MTDddot;
+        instructions["cancel"]=MTDcancel;
+        instructions["xcancel"]=MTDxcancel;
+        instructions["bcancel"]=MTDbcancel;
+        instructions["strike"]=MTDstrike;
+        instructions["st"]=MTDstrike;
+        instructions["sout"]=MTDstrike;
+        instructions["overleftarrow"]=MTDoverleftarrow;
+        instructions["overrightarrow"]=MTDoverrightarrow;
+        instructions["overleftrightarrow"]=MTDoverleftrightarrow;
+        instructions["underleftarrow"]=MTDunderleftarrow;
+        instructions["underrightarrow"]=MTDunderrightarrow;
+        instructions["underleftrightarrow"]=MTDunderleftrightarrow;
 
-    instructions["vec"]=MTDvec;
-    instructions["overline"]=MTDoverline;
-    instructions["oline"]=MTDoverline;
-    instructions["ol"]=MTDoverline;
-    instructions["underline"]=MTDunderline;
-    instructions["uline"]=MTDunderline;
-    instructions["ul"]=MTDunderline;
-    instructions["dashuline"]=MTDunderlineDashed;
-    instructions["dotuline"]=MTDunderlineDotted;
-    instructions["uuline"]=MTDdoubleunderline;
-    instructions["uul"]=MTDdoubleunderline;
-    instructions["ooline"]=MTDdoubleoverline;
-    instructions["ool"]=MTDdoubleoverline;
-    instructions["arrow"]=MTDarrow;
-    instructions["overrightarrow"]=MTDarrow;
-    instructions["overarrow"]=MTDarrow;
-    instructions["hat"]=MTDhat;
-    instructions["^"]=MTDhat;
-    instructions["widehat"]=MTDwidehat;
-    instructions["check"]=MTDcheck;
-    instructions["v"]=MTDcheck;
-    instructions["widecheck"]=MTDwidecheck;
-    instructions["bar"]=MTDbar;
-    instructions["="]=MTDbar;
-    instructions["dot"]=MTDdot;
-    instructions["."]=MTDdot;
-    instructions["ocirc"]=MTDocirc;
-    instructions["tilde"]=MTDtilde;
-    instructions["~"]=MTDtilde;
-    instructions["acute"]=MTDacute;
-    instructions["'"]=MTDacute;
-    instructions["grave"]=MTDgrave;
-    instructions["`"]=MTDgrave;
-    instructions["breve"]=MTDbreve;
-    instructions["u"]=MTDbreve;
-    instructions["widetilde"]=MTDwidetilde;
-    instructions["ddot"]=MTDddot;
-    instructions["cancel"]=MTDcancel;
-    instructions["xcancel"]=MTDxcancel;
-    instructions["bcancel"]=MTDbcancel;
-    instructions["strike"]=MTDstrike;
-    instructions["st"]=MTDstrike;
-    instructions["sout"]=MTDstrike;
-    instructions["overleftarrow"]=MTDoverleftarrow;
-    instructions["overrightarrow"]=MTDoverrightarrow;
-    instructions["overleftrightarrow"]=MTDoverleftrightarrow;
-    instructions["underleftarrow"]=MTDunderleftarrow;
-    instructions["underrightarrow"]=MTDunderrightarrow;
-    instructions["underleftrightarrow"]=MTDunderleftrightarrow;
+        return instructions;
 
+    }();
+    return table;
 }
 
 double JKQTMathTextDecoratedNode::draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv) const {
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextdecoratednode.h b/lib/jkqtmathtext/nodes/jkqtmathtextdecoratednode.h
index cf6ea52086..1d634ce350 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextdecoratednode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextdecoratednode.h
@@ -104,9 +104,7 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextDecoratedNode: public JKQTMathTextSing
         /** \brief type of decoration that is added to the child node */
         DecorationType decoration;
         /** \brief lists all supported instructions */
-        static QHash<QString, DecorationType> instructions;
-        /** \brief fills instructions */
-        static void fillInstructions();
+        static const QHash<QString, DecorationType>& instructions();
 };
 #endif // JKQTMATHTEXTDECORATEDNODE_H
 
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextfracnode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtextfracnode.cpp
index 758d6670d9..5f2a773f02 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextfracnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextfracnode.cpp
@@ -34,38 +34,36 @@
 #include <QFont>
 
 
-QHash<QString, JKQTMathTextFracNode::FracType> JKQTMathTextFracNode::instructions;
-
-
-void JKQTMathTextFracNode::fillInstructions()
-{
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (instructions.size()>0) return;
-    instructions["frac"]=MTFMfrac;
-    instructions["dfrac"] = MTFMdfrac;
-    instructions["cfrac"]=MTFMdfrac;
-    instructions["sfrac"] = MTFMsfrac;
-    instructions["slantfrac"] = MTFMsfrac;
-    instructions["xfrac"]=MTFMsfrac;
-    instructions["stfrac"] = MTFMstfrac;
-    instructions["nicefrac"] = MTFMstfrac;
-    instructions["slanttextfrac"] = MTFMstfrac;
-    instructions["xtfrac"]=MTFMstfrac;
-    instructions["tfrac"]=MTFMtfrac;
-    instructions["stackrel"]=MTFMstackrel;
-    instructions["underbrace"]=MTFMunderbrace;
-    instructions["underbracket"]=MTFMunderbracket;
-    instructions["underset"]=MTFMunderset;
-    instructions["overbrace"]=MTFMoverbrace;
-    instructions["overbracket"]=MTFMoverbracket;
-    instructions["overset"]=MTFMoverset;
+const QHash<QString, JKQTMathTextFracNode::FracType>& JKQTMathTextFracNode::instructions() {
+    static QHash<QString, JKQTMathTextFracNode::FracType> table=[]()
+        {
+            QHash<QString, JKQTMathTextFracNode::FracType> instructions;
+            instructions["frac"]=MTFMfrac;
+            instructions["dfrac"] = MTFMdfrac;
+            instructions["cfrac"]=MTFMdfrac;
+            instructions["sfrac"] = MTFMsfrac;
+            instructions["slantfrac"] = MTFMsfrac;
+            instructions["xfrac"]=MTFMsfrac;
+            instructions["stfrac"] = MTFMstfrac;
+            instructions["nicefrac"] = MTFMstfrac;
+            instructions["slanttextfrac"] = MTFMstfrac;
+            instructions["xtfrac"]=MTFMstfrac;
+            instructions["tfrac"]=MTFMtfrac;
+            instructions["stackrel"]=MTFMstackrel;
+            instructions["underbrace"]=MTFMunderbrace;
+            instructions["underbracket"]=MTFMunderbracket;
+            instructions["underset"]=MTFMunderset;
+            instructions["overbrace"]=MTFMoverbrace;
+            instructions["overbracket"]=MTFMoverbracket;
+            instructions["overset"]=MTFMoverset;
+            return instructions;
+        }();
+    return table;
 }
 
 
 
 
-
 QString JKQTMathTextFracNode::FracType2String(JKQTMathTextFracNode::FracType mode)
 {
     switch(mode) {
@@ -99,14 +97,12 @@ QString JKQTMathTextFracNode::FracType2String(JKQTMathTextFracNode::FracType mod
 
 JKQTMathTextFracNode::FracType JKQTMathTextFracNode::InstructionName2FracType(const QString &mode)
 {
-    fillInstructions();
-    return instructions.value(mode, MTFMfrac);
+    return instructions().value(mode, MTFMfrac);
 }
 
 bool JKQTMathTextFracNode::supportsInstructionName(const QString &instructionName)
 {
-    fillInstructions();
-    return instructions.contains(instructionName);
+    return instructions().contains(instructionName);
 }
 
 
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextfracnode.h b/lib/jkqtmathtext/nodes/jkqtmathtextfracnode.h
index aff8c56c47..f22449353e 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextfracnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextfracnode.h
@@ -90,9 +90,7 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextFracNode: public JKQTMathTextDualChild
         JKQTMathTextFracNode::FracType getMode() const;
     protected:
         /** \brief lists all supported instructions */
-        static QHash<QString, FracType> instructions;
-        /** \brief fills instructions */
-        static void fillInstructions();
+        static const QHash<QString, FracType>& instructions();
         /** \copydoc JKQTMathTextNode::getSizeInternal() */
         virtual JKQTMathTextNodeSize getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv) const override;
         /** \brief actual display type of fraction object */
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.cpp
index 43b988f7f8..1d3f66347b 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.cpp
@@ -64,7 +64,6 @@ JKQTMathTextSimpleInstructionNode::JKQTMathTextSimpleInstructionNode(JKQTMathTex
     instructionName(_name),
     parameters(_parameters)
 {
-    fillInstructions();
 
 }
 
@@ -81,7 +80,6 @@ QString JKQTMathTextSimpleInstructionNode::getTypeName() const
 double JKQTMathTextSimpleInstructionNode::draw(QPainter &painter, double x, double y, JKQTMathTextEnvironment currentEv) const
 {
     doDrawBoxes(painter, x, y, currentEv);
-    fillInstructions();
     QFont f=currentEv.getFont(parentMathText);
     f.setStyleStrategy(QFont::PreferDefault);
     const QFontMetricsF fm(f, painter.device());
@@ -95,7 +93,6 @@ double JKQTMathTextSimpleInstructionNode::draw(QPainter &painter, double x, doub
 
 bool JKQTMathTextSimpleInstructionNode::toHtml(QString &html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const
 {
-    fillInstructions();
     const QString txt=executeInstruction();
     html+=txt;
     return true;
@@ -113,20 +110,17 @@ const QStringList &JKQTMathTextSimpleInstructionNode::getParameters() const
 
 bool JKQTMathTextSimpleInstructionNode::supportsInstructionName(const QString &instructionName)
 {
-    fillInstructions();
-    return instructions.contains(instructionName);
+    return instructions().contains(instructionName);
 }
 
 size_t JKQTMathTextSimpleInstructionNode::countParametersOfInstruction(const QString &instructionName)
 {
-    fillInstructions();
-    if (instructions.contains(instructionName)) return instructions[instructionName].NParams;
+    if (instructions().contains(instructionName)) return instructions()[instructionName].NParams;
     return 0;
 }
 
 JKQTMathTextNodeSize JKQTMathTextSimpleInstructionNode::getSizeInternal(QPainter &painter, JKQTMathTextEnvironment currentEv) const
 {
-    fillInstructions();
     QFont f=currentEv.getFont(parentMathText);
     f.setStyleStrategy(QFont::PreferDefault);
     const QFontMetricsF fm(f, painter.device());
@@ -140,47 +134,46 @@ JKQTMathTextNodeSize JKQTMathTextSimpleInstructionNode::getSizeInternal(QPainter
     return s;
 }
 
-QHash<QString, JKQTMathTextSimpleInstructionNode::InstructionProperties> JKQTMathTextSimpleInstructionNode::instructions;
-
-void JKQTMathTextSimpleInstructionNode::fillInstructions()
-{
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (instructions.size()>0) return;
-    {
-        InstructionProperties i([](const QStringList& parameters) -> QString {
-            bool ok=false;
-            qlonglong code=parameters.value(0, "0").toLongLong(&ok, 16);
-            ok=ok&&(code>=0);
-            if (ok&&(code>=0)&&(code<=0xFFFFFFFF)) return QString::fromStdString(jkqtp_UnicodeToUTF8(static_cast<uint32_t>(code)));
-            else return QString();
-        }, 1);
-        instructions["unicode"]= i;
-        instructions["usym"]= i;
-    }
-    {
-        InstructionProperties i([](const QStringList& parameters) -> QString {
-            bool ok=false;
-            qlonglong code=parameters.value(0, "0").toLongLong(&ok, 16);
-            ok=ok&&(code>=0);
-            if (ok) {
-                QByteArray bytes;
-                while (code!=0) {
-                    bytes.prepend(static_cast<char>(code&0xFF));
-                    code=code>>8;
-                }
-                return QString::fromUtf8(bytes);
+const QHash<QString, JKQTMathTextSimpleInstructionNode::InstructionProperties>& JKQTMathTextSimpleInstructionNode::instructions() {
+    static QHash<QString, JKQTMathTextSimpleInstructionNode::InstructionProperties> table=[]()
+        {
+            QHash<QString, JKQTMathTextSimpleInstructionNode::InstructionProperties> instructions;
+            {
+                InstructionProperties i([](const QStringList& parameters) -> QString {
+                    bool ok=false;
+                    qlonglong code=parameters.value(0, "0").toLongLong(&ok, 16);
+                    ok=ok&&(code>=0);
+                    if (ok&&(code>=0)&&(code<=0xFFFFFFFF)) return QString::fromStdString(jkqtp_UnicodeToUTF8(static_cast<uint32_t>(code)));
+                    else return QString();
+                }, 1);
+                instructions["unicode"]= i;
+                instructions["usym"]= i;
             }
-            return QChar(0);
-        }, 1);
-        instructions["utfeight"]= i;
-    }
+            {
+                InstructionProperties i([](const QStringList& parameters) -> QString {
+                    bool ok=false;
+                    qlonglong code=parameters.value(0, "0").toLongLong(&ok, 16);
+                    ok=ok&&(code>=0);
+                    if (ok) {
+                        QByteArray bytes;
+                        while (code!=0) {
+                            bytes.prepend(static_cast<char>(code&0xFF));
+                            code=code>>8;
+                        }
+                        return QString::fromUtf8(bytes);
+                    }
+                    return QChar(0);
+                }, 1);
+                instructions["utfeight"]= i;
+            }
+            return instructions;
+        }();
+    return table;
 }
 
 QString JKQTMathTextSimpleInstructionNode::executeInstruction() const
 {
-    fillInstructions();
-    return instructions.value(getInstructionName(), InstructionProperties()).evaluator(getParameters());
+    return instructions().value(getInstructionName(), InstructionProperties()).evaluator(getParameters());
 }
 
 JKQTMathTextSimpleInstructionNode::InstructionProperties::InstructionProperties():
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.h b/lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.h
index 408bc1c757..1ce40c6a5f 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.h
@@ -103,14 +103,11 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSimpleInstructionNode: public JKQTMath
             /** \brief output of the instruction */
             EvaluateInstructionFunctor evaluator;
         };
-
-        /** \brief fills instructions
+        /** \brief defines all implemented instructions in this node
          *
          *  \note this is the customization point for new instructions!
          */
-        static void fillInstructions();
-        /** \brief defines all implemented instructions in this node */
-        static QHash<QString, InstructionProperties> instructions;
+        static const QHash<QString, InstructionProperties>& instructions();
         /** \brief executes the instruction on \a ev */
         QString executeInstruction() const;
         /** \brief instruction name */
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextmodifyenvironmentnode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtextmodifyenvironmentnode.cpp
index 4ea968edc0..a275c8e772 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextmodifyenvironmentnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextmodifyenvironmentnode.cpp
@@ -38,7 +38,6 @@
 JKQTMathTextModifiedTextPropsInstructionNode::JKQTMathTextModifiedTextPropsInstructionNode(JKQTMathText* _parent, const QString& name, JKQTMathTextNode* child, const QStringList& parameters):
     JKQTMathTextInstruction1Node(_parent, name, child, parameters)
 {
-    fillInstructions();
 }
 
 JKQTMathTextModifiedTextPropsInstructionNode::~JKQTMathTextModifiedTextPropsInstructionNode() {
@@ -51,7 +50,6 @@ QString JKQTMathTextModifiedTextPropsInstructionNode::getTypeName() const
 }
 
 JKQTMathTextNodeSize JKQTMathTextModifiedTextPropsInstructionNode::getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv) const {
-    fillInstructions();
     JKQTMathTextEnvironment ev=currentEv;
 
     executeInstruction(ev);
@@ -60,7 +58,6 @@ JKQTMathTextNodeSize JKQTMathTextModifiedTextPropsInstructionNode::getSizeIntern
 }
 
 double JKQTMathTextModifiedTextPropsInstructionNode::draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv) const {
-    fillInstructions();
     doDrawBoxes(painter, x, y, currentEv);
     JKQTMathTextEnvironment ev=currentEv;
 
@@ -71,7 +68,6 @@ double JKQTMathTextModifiedTextPropsInstructionNode::draw(QPainter& painter, dou
 
 bool JKQTMathTextModifiedTextPropsInstructionNode::toHtml(QString &html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const {
     JKQTMathTextEnvironment ev=currentEv;
-    fillInstructions();
     executeInstruction(ev);
 
     return getChild()->toHtml(html, ev, defaultEv);
@@ -79,25 +75,22 @@ bool JKQTMathTextModifiedTextPropsInstructionNode::toHtml(QString &html, JKQTMat
 
 bool JKQTMathTextModifiedTextPropsInstructionNode::supportsInstructionName(const QString &instructionName)
 {
-    fillInstructions();
-    return instructions.contains(instructionName);
+    return instructions().contains(instructionName);
 }
 
 size_t JKQTMathTextModifiedTextPropsInstructionNode::countParametersOfInstruction(const QString &instructionName)
 {
-    fillInstructions();
-    if (instructions.contains(instructionName)) return instructions[instructionName].NParams;
+    if (instructions().contains(instructionName)) return instructions()[instructionName].NParams;
     return 0;
 }
 
 void JKQTMathTextModifiedTextPropsInstructionNode::modifyInMathEnvironment(const QString &instructionName, bool &insideMath, bool& insideMathTextStyle, const QStringList& params)
 {
-    fillInstructions();
-    if (instructions.contains(instructionName)) {
+    if (instructions().contains(instructionName)) {
         JKQTMathTextEnvironment ev;
         ev.insideMath=insideMath;
         ev.insideMathUseTextStyle=insideMathTextStyle;
-        instructions[instructionName].modifier(ev, params);
+        instructions()[instructionName].modifier(ev, params);
         insideMath=ev.insideMath;
         insideMathTextStyle=ev.insideMathUseTextStyle;
     }
@@ -106,356 +99,355 @@ void JKQTMathTextModifiedTextPropsInstructionNode::modifyInMathEnvironment(const
 
 void JKQTMathTextModifiedTextPropsInstructionNode::executeInstruction(JKQTMathTextEnvironment &ev) const
 {
-    fillInstructions();
-    instructions.value(getInstructionName(), InstructionProperties()).modifier(ev, getParameters());
+    instructions().value(getInstructionName(), InstructionProperties()).modifier(ev, getParameters());
 }
 
-QHash<QString, JKQTMathTextModifiedTextPropsInstructionNode::InstructionProperties> JKQTMathTextModifiedTextPropsInstructionNode::instructions;
+const QHash<QString, JKQTMathTextModifiedTextPropsInstructionNode::InstructionProperties>& JKQTMathTextModifiedTextPropsInstructionNode::instructions() {
+    static QHash<QString, JKQTMathTextModifiedTextPropsInstructionNode::InstructionProperties> table=[]()
+        {
 
-void JKQTMathTextModifiedTextPropsInstructionNode::fillInstructions()
-{
-
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (instructions.size()>0) return;
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.bold=false;
-            ev.insideMathForceDigitsUpright=true;
-            ev.italic=false;
-            ev.underlined=false;
-            ev.overline=false;
-            ev.strike=false;
-            ev.font=MTEroman;
-        }, 0);
-        instructions["textnormal"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.bold=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["textbf"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.bold=true;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathbf"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.italic=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["textit"] = i;
-        instructions["mathit"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.italic=!ev.italic;
-        }, 0);
-        instructions["emph"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.italic=false;
-        }, 0);
-        instructions["textup"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters) {
-            ev.color=jkqtp_String2QColor(parameters.value(0, ev.color.name()));
-        }, 1);
-        instructions["textcolor"] = i;
-        instructions["mathcolor"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters) {
-            ev.customFontName=parameters.value(0, "");
-            ev.font=MTECustomFont;
-        }, 1);
-        instructions["userfont"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.beginMathMode();
-        }, 0);
-        instructions["ensuremath"] = i;
-        instructions["equation"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.capitalization=QFont::SmallCaps;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["textsc"] = i;
-        instructions["mathsc"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.capitalization=QFont::AllUppercase;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["uppercase"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.capitalization=QFont::AllLowercase;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["lowercase"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.underlined=true;
-        }, 0);
-        instructions["ul"] = i;
-        instructions["underlined"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.overline=true;
-        }, 0);
-        instructions["ol"] = i;
-        instructions["overlined"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.strike=true;
-        }, 0);
-        instructions["strike"]= i;
-        instructions["st"]= i;
-        instructions["sout"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEroman;
-            ev.italic=false;
-        }, 0);
-        instructions["textrm"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEroman;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathrm"] = i;
-        instructions["unit"] = i;
-        instructions["operatorname"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.bold=true;
-            ev.italic=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathbfit"] = i;
-        instructions["textbfit"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.endMathMode();
-            ev.font=JKQTMathTextEnvironmentFont::MTEroman;
-        }, 0);
-        instructions["text"] = i;
-        instructions["mbox"] = i;
-        instructions["ensuretext"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEroman;
-            ev.italic=false;
-            ev.bold=true;
-        }, 0);
-        instructions["mat"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathcal"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
-        }, 0);
-        instructions["textcal"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
-            ev.italic=false;
-            ev.bold=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathbfcal"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
-            ev.bold=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["textfcal"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
-        }, 0);
-        instructions["textfrak"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathfrak"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
-            ev.bold=true;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathbffrak"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
-            ev.bold=true;
-        }, 0);
-        instructions["textbffrak"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEblackboard;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["textbb"] = i;
-        instructions["mathbb"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
-        }, 0);
-        instructions["texttt"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathtt"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
-            ev.bold=true;
-        }, 0);
-        instructions["textbftt"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
-            ev.italic=false;
-            ev.bold=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathbftt"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEsans;
-        }, 0);
-        instructions["textsf"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEsans;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathsf"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEsans;
-            ev.italic=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["textitsf"] = i;
-        instructions["mathitsf"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEscript;
-        }, 0);
-        instructions["textscript"] = i;
-        instructions["textscr"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEscript;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathscript"] = i;
-        instructions["mathscr"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEscript;
-            ev.bold=true;
-        }, 0);
-        instructions["textbfscript"] = i;
-        instructions["textbfscr"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEscript;
-            ev.bold=true;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["mathbfscript"] = i;
-        instructions["mathbfscr"]= i;
-    }
+            QHash<QString, JKQTMathTextModifiedTextPropsInstructionNode::InstructionProperties> instructions;
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.bold=false;
+                    ev.insideMathForceDigitsUpright=true;
+                    ev.italic=false;
+                    ev.underlined=false;
+                    ev.overline=false;
+                    ev.strike=false;
+                    ev.font=MTEroman;
+                }, 0);
+                instructions["textnormal"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.bold=true;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["textbf"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.bold=true;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathbf"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.italic=true;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["textit"] = i;
+                instructions["mathit"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.italic=!ev.italic;
+                }, 0);
+                instructions["emph"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.italic=false;
+                }, 0);
+                instructions["textup"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters) {
+                    ev.color=jkqtp_String2QColor(parameters.value(0, ev.color.name()));
+                }, 1);
+                instructions["textcolor"] = i;
+                instructions["mathcolor"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters) {
+                    ev.customFontName=parameters.value(0, "");
+                    ev.font=MTECustomFont;
+                }, 1);
+                instructions["userfont"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.beginMathMode();
+                }, 0);
+                instructions["ensuremath"] = i;
+                instructions["equation"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.capitalization=QFont::SmallCaps;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["textsc"] = i;
+                instructions["mathsc"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.capitalization=QFont::AllUppercase;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["uppercase"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.capitalization=QFont::AllLowercase;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["lowercase"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.underlined=true;
+                }, 0);
+                instructions["ul"] = i;
+                instructions["underlined"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.overline=true;
+                }, 0);
+                instructions["ol"] = i;
+                instructions["overlined"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.strike=true;
+                }, 0);
+                instructions["strike"]= i;
+                instructions["st"]= i;
+                instructions["sout"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEroman;
+                    ev.italic=false;
+                }, 0);
+                instructions["textrm"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEroman;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathrm"] = i;
+                instructions["unit"] = i;
+                instructions["operatorname"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.bold=true;
+                    ev.italic=true;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathbfit"] = i;
+                instructions["textbfit"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.endMathMode();
+                    ev.font=JKQTMathTextEnvironmentFont::MTEroman;
+                }, 0);
+                instructions["text"] = i;
+                instructions["mbox"] = i;
+                instructions["ensuretext"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEroman;
+                    ev.italic=false;
+                    ev.bold=true;
+                }, 0);
+                instructions["mat"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathcal"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
+                }, 0);
+                instructions["textcal"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
+                    ev.italic=false;
+                    ev.bold=true;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathbfcal"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
+                    ev.bold=true;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["textfcal"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
+                }, 0);
+                instructions["textfrak"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathfrak"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
+                    ev.bold=true;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathbffrak"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
+                    ev.bold=true;
+                }, 0);
+                instructions["textbffrak"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEblackboard;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["textbb"] = i;
+                instructions["mathbb"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
+                }, 0);
+                instructions["texttt"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathtt"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
+                    ev.bold=true;
+                }, 0);
+                instructions["textbftt"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
+                    ev.italic=false;
+                    ev.bold=true;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathbftt"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEsans;
+                }, 0);
+                instructions["textsf"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEsans;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathsf"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEsans;
+                    ev.italic=true;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["textitsf"] = i;
+                instructions["mathitsf"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEscript;
+                }, 0);
+                instructions["textscript"] = i;
+                instructions["textscr"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEscript;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathscript"] = i;
+                instructions["mathscr"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEscript;
+                    ev.bold=true;
+                }, 0);
+                instructions["textbfscript"] = i;
+                instructions["textbfscr"] = i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.font=JKQTMathTextEnvironmentFont::MTEscript;
+                    ev.bold=true;
+                    ev.italic=false;
+                    ev.insideMathForceDigitsUpright=false;
+                }, 0);
+                instructions["mathbfscript"] = i;
+                instructions["mathbfscr"]= i;
+            }
 
 
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.fontSize=ev.fontSize*1.2;
-        }, 0);
-        instructions["bigsize"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.fontSize=ev.fontSize*1.85;
-        }, 0);
-        instructions["Bigsize"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.fontSize=ev.fontSize*2.4;
-        }, 0);
-        instructions["biggsize"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
-            ev.fontSize=ev.fontSize*3.1;
-        }, 0);
-        instructions["Biggsize"]= i;
-    }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.fontSize=ev.fontSize*1.2;
+                }, 0);
+                instructions["bigsize"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.fontSize=ev.fontSize*1.85;
+                }, 0);
+                instructions["Bigsize"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.fontSize=ev.fontSize*2.4;
+                }, 0);
+                instructions["biggsize"]= i;
+            }
+            {
+                InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/) {
+                    ev.fontSize=ev.fontSize*3.1;
+                }, 0);
+                instructions["Biggsize"]= i;
+            }
+            return instructions;
+        }();
+    return table;
 }
 
 JKQTMathTextModifiedTextPropsInstructionNode::InstructionProperties::InstructionProperties():
@@ -479,7 +471,6 @@ JKQTMathTextModifiedEnvironmentInstructionNode::JKQTMathTextModifiedEnvironmentI
     instructionName(name_),
     parameters(parameters_)
 {
-    fillInstructions();
 }
 
 JKQTMathTextModifiedEnvironmentInstructionNode::~JKQTMathTextModifiedEnvironmentInstructionNode()
@@ -504,323 +495,316 @@ const QStringList &JKQTMathTextModifiedEnvironmentInstructionNode::getParameters
 
 void JKQTMathTextModifiedEnvironmentInstructionNode::modifyEnvironment(JKQTMathTextEnvironment &currentEv) const
 {
-    fillInstructions();
-    instructions.value(getInstructionName(), InstructionProperties()).modifier(currentEv, getParameters(), parentMathText);
+    instructions().value(getInstructionName(), InstructionProperties()).modifier(currentEv, getParameters(), parentMathText);
 }
 
 bool JKQTMathTextModifiedEnvironmentInstructionNode::supportsInstructionName(const QString &instructionName)
 {
-    fillInstructions();
-    return instructions.contains(instructionName);
+    return instructions().contains(instructionName);
 }
 
 size_t JKQTMathTextModifiedEnvironmentInstructionNode::countParametersOfInstruction(const QString &instructionName)
 {
-    fillInstructions();
-    if (instructions.contains(instructionName)) return instructions[instructionName].NParams;
+    if (instructions().contains(instructionName)) return instructions()[instructionName].NParams;
     return 0;
 }
 
 void JKQTMathTextModifiedEnvironmentInstructionNode::modifyInMathTextStyleEnvironment(const QString &instructionName, bool &insideMathTextStyle, JKQTMathText* parentMathText, const QStringList &params)
 {
-    fillInstructions();
-    if (instructions.contains(instructionName)) {
+    if (instructions().contains(instructionName)) {
         JKQTMathTextEnvironment ev;
         ev.insideMathUseTextStyle=insideMathTextStyle;
-        instructions[instructionName].modifier(ev, params, parentMathText);
+        instructions()[instructionName].modifier(ev, params, parentMathText);
         insideMathTextStyle=ev.insideMathUseTextStyle;
     }
 }
 
-QHash<QString, JKQTMathTextModifiedEnvironmentInstructionNode::InstructionProperties> JKQTMathTextModifiedEnvironmentInstructionNode::instructions;
+const QHash<QString, JKQTMathTextModifiedEnvironmentInstructionNode::InstructionProperties>& JKQTMathTextModifiedEnvironmentInstructionNode::instructions() {
+    static QHash<QString, JKQTMathTextModifiedEnvironmentInstructionNode::InstructionProperties> table=[](){
+        QHash<QString, JKQTMathTextModifiedEnvironmentInstructionNode::InstructionProperties> instructions;
 
-void JKQTMathTextModifiedEnvironmentInstructionNode::fillInstructions()
-{
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (instructions.size()>0) return;
-
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.bold=false;
-            ev.insideMathForceDigitsUpright=true;
-            ev.italic=false;
-            ev.underlined=false;
-            ev.overline=false;
-            ev.strike=false;
-            ev.font=MTEroman;
-            ev.fontSize=parentMathText->getFontSize();
-            ev.capitalization=QFont::MixedCase;
-            ev.color=parentMathText->getFontColor();
-        }, 0);
-        instructions["normalfont"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.bold=false;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["md"] = i;
-        instructions["mdseries"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.bold=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["bf"] = i;
-        instructions["bfseries"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.italic=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["it"] = i;
-        instructions["itshape"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["up"] = i;
-        instructions["upshape"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.italic=!ev.italic;
-        }, 0);
-        instructions["em"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters, const JKQTMathText* parentMathText) {
-            ev.color=jkqtp_String2QColor(parameters.value(0, ev.color.name()));
-        }, 1);
-        instructions["color"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters, const JKQTMathText* parentMathText) {
-            ev.customFontName=parameters.value(0, "");
-            ev.font=MTECustomFont;
-        }, 1);
-        instructions["setfont"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.capitalization=QFont::SmallCaps;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["sc"] = i;
-        instructions["scshape"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEroman;
-            ev.italic=false;
-        }, 0);
-        instructions["rm"] = i;
-        instructions["rmfamily"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.bold=true;
-            ev.italic=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["bfit"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
-        }, 0);
-        instructions["cal"] = i;
-        instructions["calfamily"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
-            ev.bold=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["bbfcal"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
-        }, 0);
-        instructions["frak"] = i;
-        instructions["frakfamily"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
-            ev.bold=true;
-        }, 0);
-        instructions["bffrak"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEblackboard;
-            ev.italic=false;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["bb"] = i;
-        instructions["bbfamily"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
-        }, 0);
-        instructions["tt"] = i;
-        instructions["ttfamily"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
-            ev.bold=true;
-        }, 0);
-        instructions["bftt"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEsans;
-        }, 0);
-        instructions["sf"] = i;
-        instructions["sffamily"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEsans;
-            ev.italic=true;
-            ev.insideMathForceDigitsUpright=false;
-        }, 0);
-        instructions["itsf"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEscript;
-        }, 0);
-        instructions["script"] = i;
-        instructions["scr"] = i;
-        instructions["scriptseries"] = i;
-        instructions["scrseries"] = i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.font=JKQTMathTextEnvironmentFont::MTEscript;
-            ev.bold=true;
-        }, 0);
-        instructions["bfscript"] = i;
-        instructions["bfscr"] = i;
-    }
-
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize();
-            ev.insideMathUseTextStyle=false;
-        }, 0);
-        instructions["displaystyle"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize();
-            ev.insideMathUseTextStyle=true;
-        }, 0);
-        instructions["textstyle"]= i;
-    }
-
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*0.75;
-            ev.insideMathUseTextStyle=true;
-        }, 0);
-        instructions["scriptstyle"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*0.5;
-            ev.insideMathUseTextStyle=true;
-        }, 0);
-        instructions["scriptscriptstyle"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*6.0/11.0;
-        }, 0);
-        instructions["tiny"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*7.0/11.0;
-        }, 0);
-        instructions["ssmall"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*8.0/11.0;
-        }, 0);
-        instructions["scriptsize"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*9.0/11.0;
-        }, 0);
-        instructions["footnotesize"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*10.0/11.0;
-        }, 0);
-        instructions["small"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*11.0/11.0;
-        }, 0);
-        instructions["normalsize"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*12.0/11.0;
-        }, 0);
-        instructions["large"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*14.4/11.0;
-        }, 0);
-        instructions["Large"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*17.28/11.0;
-        }, 0);
-        instructions["LARGE"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*20.74/11.0;
-        }, 0);
-        instructions["huge"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
-            ev.fontSize=parentMathText->getFontSize()*24.88/11.0;
-        }, 0);
-        instructions["Huge"]= i;
-    }
-    {
-        InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters, const JKQTMathText* parentMathText) {
-            ev.fontSize=parameters.value(0, QString::number(ev.fontSize)).toDouble();
-            ev.fontSizeUnit=JKQTMathTextEnvironment::POINTS;
-        }, 1);
-        instructions["userfontsize"]= i;
-        instructions["fontsize"]= i;
-    }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.bold=false;
+                ev.insideMathForceDigitsUpright=true;
+                ev.italic=false;
+                ev.underlined=false;
+                ev.overline=false;
+                ev.strike=false;
+                ev.font=MTEroman;
+                ev.fontSize=parentMathText->getFontSize();
+                ev.capitalization=QFont::MixedCase;
+                ev.color=parentMathText->getFontColor();
+            }, 0);
+            instructions["normalfont"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.bold=false;
+                ev.italic=false;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["md"] = i;
+            instructions["mdseries"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.bold=true;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["bf"] = i;
+            instructions["bfseries"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.italic=true;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["it"] = i;
+            instructions["itshape"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.italic=false;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["up"] = i;
+            instructions["upshape"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.italic=!ev.italic;
+            }, 0);
+            instructions["em"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters, const JKQTMathText* parentMathText) {
+                ev.color=jkqtp_String2QColor(parameters.value(0, ev.color.name()));
+            }, 1);
+            instructions["color"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters, const JKQTMathText* parentMathText) {
+                ev.customFontName=parameters.value(0, "");
+                ev.font=MTECustomFont;
+            }, 1);
+            instructions["setfont"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.capitalization=QFont::SmallCaps;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["sc"] = i;
+            instructions["scshape"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEroman;
+                ev.italic=false;
+            }, 0);
+            instructions["rm"] = i;
+            instructions["rmfamily"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.bold=true;
+                ev.italic=true;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["bfit"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
+            }, 0);
+            instructions["cal"] = i;
+            instructions["calfamily"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEcaligraphic;
+                ev.bold=true;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["bbfcal"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
+            }, 0);
+            instructions["frak"] = i;
+            instructions["frakfamily"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEfraktur;
+                ev.bold=true;
+            }, 0);
+            instructions["bffrak"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEblackboard;
+                ev.italic=false;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["bb"] = i;
+            instructions["bbfamily"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
+            }, 0);
+            instructions["tt"] = i;
+            instructions["ttfamily"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEtypewriter;
+                ev.bold=true;
+            }, 0);
+            instructions["bftt"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEsans;
+            }, 0);
+            instructions["sf"] = i;
+            instructions["sffamily"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEsans;
+                ev.italic=true;
+                ev.insideMathForceDigitsUpright=false;
+            }, 0);
+            instructions["itsf"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEscript;
+            }, 0);
+            instructions["script"] = i;
+            instructions["scr"] = i;
+            instructions["scriptseries"] = i;
+            instructions["scrseries"] = i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.font=JKQTMathTextEnvironmentFont::MTEscript;
+                ev.bold=true;
+            }, 0);
+            instructions["bfscript"] = i;
+            instructions["bfscr"] = i;
+        }
 
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize();
+                ev.insideMathUseTextStyle=false;
+            }, 0);
+            instructions["displaystyle"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize();
+                ev.insideMathUseTextStyle=true;
+            }, 0);
+            instructions["textstyle"]= i;
+        }
 
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*0.75;
+                ev.insideMathUseTextStyle=true;
+            }, 0);
+            instructions["scriptstyle"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*0.5;
+                ev.insideMathUseTextStyle=true;
+            }, 0);
+            instructions["scriptscriptstyle"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*6.0/11.0;
+            }, 0);
+            instructions["tiny"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*7.0/11.0;
+            }, 0);
+            instructions["ssmall"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*8.0/11.0;
+            }, 0);
+            instructions["scriptsize"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*9.0/11.0;
+            }, 0);
+            instructions["footnotesize"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*10.0/11.0;
+            }, 0);
+            instructions["small"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*11.0/11.0;
+            }, 0);
+            instructions["normalsize"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*12.0/11.0;
+            }, 0);
+            instructions["large"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*14.4/11.0;
+            }, 0);
+            instructions["Large"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*17.28/11.0;
+            }, 0);
+            instructions["LARGE"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*20.74/11.0;
+            }, 0);
+            instructions["huge"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& /*parameters*/, const JKQTMathText* parentMathText) {
+                ev.fontSize=parentMathText->getFontSize()*24.88/11.0;
+            }, 0);
+            instructions["Huge"]= i;
+        }
+        {
+            InstructionProperties i([](JKQTMathTextEnvironment& ev, const QStringList& parameters, const JKQTMathText* parentMathText) {
+                ev.fontSize=parameters.value(0, QString::number(ev.fontSize)).toDouble();
+                ev.fontSizeUnit=JKQTMathTextEnvironment::POINTS;
+            }, 1);
+            instructions["userfontsize"]= i;
+            instructions["fontsize"]= i;
+        }
+        return instructions;
+    }();
+    return table;
 }
 
 JKQTMathTextModifiedEnvironmentInstructionNode::InstructionProperties::InstructionProperties():
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextmodifyenvironmentnode.h b/lib/jkqtmathtext/nodes/jkqtmathtextmodifyenvironmentnode.h
index 00a7d772fa..039d610701 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextmodifyenvironmentnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextmodifyenvironmentnode.h
@@ -53,15 +53,15 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextModifiedTextPropsInstructionNode: publ
         virtual bool toHtml(QString& html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const override;
 
         /** \brief returns true, if the given \a instructionName can be represented by this node
-         *  \see instructions
+         *  \see instructions()
          */
         static bool supportsInstructionName(const QString& instructionName);
         /** \brief returns the number of additional string parameters, required for the given \a instructionName
-         *  \see instructions
+         *  \see instructions()
          */
         static size_t countParametersOfInstruction(const QString& instructionName);
         /** \brief sets \a insideMath to \c true if inside the node is to be parsed in math mode and \c false else
-         *  \see instructions
+         *  \see instructions()
          */
         static void modifyInMathEnvironment(const QString& instructionName, bool& insideMath, bool &insideMathTextStyle, const QStringList &params=QStringList());
 
@@ -82,13 +82,11 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextModifiedTextPropsInstructionNode: publ
             ModifyEnvironmentFunctor modifier;
         };
 
-        /** \brief fills instructions
+        /** \brief defines all implemented instructions in this node
          *
          *  \note this is the customization point for new instructions!
          */
-        static void fillInstructions();
-        /** \brief defines all implemented instructions in this node */
-        static QHash<QString, InstructionProperties> instructions;
+        static const QHash<QString, InstructionProperties>& instructions();
         /** \brief executes the instruction on \a ev */
         void executeInstruction(JKQTMathTextEnvironment& ev) const;
 };
@@ -116,15 +114,15 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextModifiedEnvironmentInstructionNode: pu
         virtual void modifyEnvironment(JKQTMathTextEnvironment& currentEv) const override;
 
         /** \brief returns true, if the given \a instructionName can be represented by this node
-         *  \see instructions
+         *  \see instructions()
          */
         static bool supportsInstructionName(const QString& instructionName);
         /** \brief returns the number of additional string parameters, required for the given \a instructionName
-         *  \see instructions
+         *  \see instructions()
          */
         static size_t countParametersOfInstruction(const QString& instructionName);
         /** \brief sets \a insideMathTextStyle to \c true if textstyle is set inside math
-         *  \see instructions
+         *  \see instructions()
          */
         static void modifyInMathTextStyleEnvironment(const QString& instructionName, bool &insideMathTextStyle, JKQTMathText *parentMathText, const QStringList &params=QStringList());
     protected:
@@ -146,13 +144,11 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextModifiedEnvironmentInstructionNode: pu
             ModifyEnvironmentFunctor modifier;
         };
 
-        /** \brief fills instructions
+        /** \brief defines all implemented instructions in this node
          *
          *  \note this is the customization point for new instructions!
          */
-        static void fillInstructions();
-        /** \brief defines all implemented instructions in this node */
-        static QHash<QString, InstructionProperties> instructions;
+        static const QHash<QString, InstructionProperties>& instructions();
 };
 
 
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.cpp
index ff9c064a5b..68cdfc9c05 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.cpp
@@ -38,7 +38,6 @@
 JKQTMathTextSymbolNode::JKQTMathTextSymbolNode(JKQTMathText* _parent, const QString& name):
     JKQTMathTextNode(_parent), symbolName(name)
 {
-    fillSymbolTables();
 }
 
 JKQTMathTextSymbolNode::~JKQTMathTextSymbolNode() {
@@ -142,7 +141,7 @@ double JKQTMathTextSymbolNode::draw(QPainter& painter, double x, double y, JKQTM
     const NodeSize s=getSymbolSize(painter, currentEv);
     doDrawBoxes(painter, x, y, s);
 
-    const auto fullProps=symbols.value(symbolName, SymbolFullProps());
+    const auto fullProps=symbols().value(symbolName, SymbolFullProps());
     const GlobalSymbolFlags globalFlags=fullProps.globalFlags;
     const auto drawProps=fullProps.getDrawingData(currentEv, parentMathText, painter);
     const QFont f=drawProps.first;
@@ -217,7 +216,7 @@ double JKQTMathTextSymbolNode::draw(QPainter& painter, double x, double y, JKQTM
 
 bool JKQTMathTextSymbolNode::toHtml(QString &html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const {
     bool ok=true;
-    const auto props=symbols.value(symbolName, SymbolFullProps());
+    const auto props=symbols().value(symbolName, SymbolFullProps());
     QString s=props.html.symbol;
     JKQTMathTextEnvironment ev=currentEv;
     ev.fontSize=ev.fontSize*props.html.fontScalingFactor;
@@ -235,7 +234,7 @@ JKQTMathTextSymbolNode::NodeSize JKQTMathTextSymbolNode::getSymbolSize(QPainter
 {
     NodeSize s;
 
-    const auto fullProps=symbols.value(symbolName, SymbolFullProps());
+    const auto fullProps=symbols().value(symbolName, SymbolFullProps());
     const GlobalSymbolFlags globalFlags=fullProps.globalFlags;
     const auto drawProps=fullProps.getDrawingData(currentEv, parentMathText, painter);
     const QFont f=drawProps.first;
@@ -297,39 +296,34 @@ JKQTMathTextSymbolNode::NodeSize JKQTMathTextSymbolNode::getSymbolSize(QPainter
 
 bool JKQTMathTextSymbolNode::hasSymbol(const QString &symbolName)
 {
-    fillSymbolTables();
-    return symbols.contains(symbolName);
+    return symbols().contains(symbolName);
 }
 
 QStringList JKQTMathTextSymbolNode::getSymbols()
 {
-    fillSymbolTables();
-    return symbols.keys();
+    return symbols().keys();
 }
 
 bool JKQTMathTextSymbolNode::isSubSuperscriptBelowAboveSymbol(const QString &symbolName)
 {
-    fillSymbolTables();
-    if (symbols.contains(symbolName)) {
-        return has(symbols[symbolName].globalFlags, SubSuperscriptBelowAboveSymbol);
+    if (symbols().contains(symbolName)) {
+        return has(symbols()[symbolName].globalFlags, SubSuperscriptBelowAboveSymbol);
     }
     return false;
 }
 
 bool JKQTMathTextSymbolNode::isExtendedWidthSymbol(const QString &symbolName)
 {
-    fillSymbolTables();
-    if (symbols.contains(symbolName)) {
-        return has(symbols[symbolName].globalFlags, ExtendWidthInMathmode) ||  has(symbols[symbolName].globalFlags, SmallExtendWidthInMathmode);
+    if (symbols().contains(symbolName)) {
+        return has(symbols()[symbolName].globalFlags, ExtendWidthInMathmode) ||  has(symbols()[symbolName].globalFlags, SmallExtendWidthInMathmode);
     }
     return false;
 }
 
 int JKQTMathTextSymbolNode::getSymbolLength(const QString &symbolName)
 {
-    fillSymbolTables();
-    if (symbols.contains(symbolName)) {
-        return symbols[symbolName].props.value(MTFEUnicode, symbols[symbolName].props.value(MTFEStandard, SymbolProps())).symbol.size();
+    if (symbols().contains(symbolName)) {
+        return symbols()[symbolName].props.value(MTFEUnicode, symbols()[symbolName].props.value(MTFEStandard, SymbolProps())).symbol.size();
     }
     return 0;
 }
@@ -381,6 +375,439 @@ JKQTMathTextSymbolNode::SymbolFullProps JKQTMathTextSymbolNode::NarrowMathOperat
     return SymbolFullProps(SymbolProps(op, ItalicOff|BoldOff|HeightIsAscent, 1.0, 0.0)).addGlobalFlags(SmallExtendWidthInMathmode|MakeWhitespaceHalf).addHtml(ophtml, ItalicOff|BoldOff|HeightIsAscent, 1.0, 0.0);
 }
 
+const QHash<QString, JKQTMathTextSymbolNode::SymbolFullProps> &JKQTMathTextSymbolNode::symbols()
+{
+    static QHash<QString, JKQTMathTextSymbolNode::SymbolFullProps> s_symbols=[](){
+        QHash<QString, JKQTMathTextSymbolNode::SymbolFullProps> symbols;
+
+        /**************************************************************************************
+         * STANDARD Symbols available in all standard fonts
+         **************************************************************************************/
+        symbols["#"]=SimpleTextSymbol("#", "&num;");
+        symbols["%"]=SimpleTextSymbol("%", "&NestedGreaterGreater;");
+        symbols["&"]=SimpleTextSymbol("&", "&amp;");
+        symbols["("]=SimpleUprightTextSymbol("(");
+        symbols[")"]=SimpleUprightTextSymbol(")");
+        symbols["["]=SimpleUprightTextSymbol("[");
+        symbols["]"]=SimpleUprightTextSymbol("]");
+        symbols["_"]=SimpleTextSymbol("_");
+        symbols["{"]=SimpleUprightTextSymbol("{");
+        symbols["|"]=SimpleUprightTextSymbol("||", "&Vert;").addUprightUnicode(QChar(0x2016));
+        symbols["}"]=SimpleUprightTextSymbol("}");
+        symbols["AC"]=UprightSymbolUnicode(QChar(0x223F)).addUprightHtml("&acd;").addUprightStd("~");
+        symbols["circonflex"]=SimpleTextSymbol("^");
+        symbols["aa"]=SimpleTextSymbol(QChar(0xE5));
+        symbols["ae"]=SimpleTextSymbol(QChar(0xE6));
+        symbols["AE"]=SimpleTextSymbol(QChar(0xC6));
+        symbols["AA"]=SimpleTextSymbol(QChar(0xC5));
+        symbols["oe"]=UnicodeSymbol(QChar(0x153)).addStd("oe").addHtml("&oelig;");
+        symbols["OE"]=UnicodeSymbol(QChar(0x152)).addStd("OE").addHtml("&OElig;");
+        symbols["ss"]=SimpleTextSymbol(QChar(0xDF)).addHtml("&szlig;");
+        symbols["l"]=UnicodeSymbol(QChar(0x141)).addHtml("&lstrok;");
+        symbols["L"]=UnicodeSymbol(QChar(0x142)).addHtml("&Lstrok;");
+        symbols["o"]=SimpleTextSymbol(QChar(0xF8)).addHtml("&oslash;");
+        symbols["O"]=SimpleTextSymbol(QChar(0xD8)).addHtml("&Oslash;");
+        { auto s=UprightSymbolUnicode(QChar(0x212B)).addUprightStd(QChar(0xC5));
+          symbols["Angstrom"]=s; symbols["angstrom"]=s; }
+        { auto s=UnicodeSymbol(QChar(0x2136)).addHtml("&beth;");
+          symbols["Beth"]=s; symbols["Bet"]=s; symbols["beth"]=s; symbols["bet"]=s; }
+        symbols["Box"]=UprightSymbolUnicode(QChar(0x25A1));
+        symbols["DC"]=UnicodeSymbol(QChar(0x2393)).addWinSymbol(QChar(0xBB)).addStd("=");
+        symbols["EUR"]=UnicodeSymbol(QChar(0x20AC));
+        symbols["Im"]=UprightSymbolUnicode(QChar(0x2111)).addHtml("&image;").addWinSymbol(QChar(0xC1));
+        symbols["No"]=UnicodeSymbol(QChar(0x2116));
+        { auto s=UprightSymbolUnicode(QChar(0x2126)).addUprightWinSymbol("W").addUprightHtml("&Omega;");
+          symbols["Ohm"]=s; symbols["ohm"]=s; }
+        symbols["P"]=SimpleTextSymbol(QChar(0xB6)).addHtml("&para;");
+        symbols["Re"]=UnicodeSymbol(QChar(0x211C)).addHtml("&Rfr;").addWinSymbol(QChar(0xC2));
+        { auto s=SimpleTextSymbol(QChar(0xA7)).addHtml("&sect;");
+            symbols["S"]=s; symbols["§"]=s;}
+        symbols["accurrent"]=UnicodeSymbol(QChar(0x23E6));
+        { auto s=UnicodeSymbol(QChar(0x2135)).addHtml("&aleph;").addWinSymbol(QChar(0xC0));
+            symbols["alef"]=s; symbols["aleph"]=s; symbols["Aleph"]=s; symbols["Alef"]=s; }
+        symbols["angle"]=UprightSymbolUnicode(QChar(0x2220)).addHtml("&angle;").addWinSymbol(QChar(0xD0));
+        symbols["backslash"]=SimpleTextSymbol("\\");
+        symbols["benzene"]=UprightSymbolUnicode(QChar(0x232C));
+        symbols["benzenr"]=UprightSymbolUnicode(QChar(0x23E3));
+        symbols["blacksquare"]=UprightSymbolUnicode(QChar(0x220E)).addUprightHtml("&squ;");
+        { auto s=UprightSymbolUnicode(QChar(0x231E));
+            symbols["blcorner"]=s; symbols["llcorner"]=s; }
+        { auto s=UprightSymbolUnicode(QChar(0x231F));
+            symbols["brcorner"]=s; symbols["lrcorner"]=s; }
+        { auto s=UprightSymbolUnicode(QChar(0x2022)).addUprightHtml("&bull;").addUprightWinSymbol(QChar(0xB7));
+            symbols["bullet"]=s; symbols["textbullet"]=s; }
+        symbols["cdots"]=UprightSymbolUnicode(QChar(0x22EF)).addUprightHtml("&middot;&middot;&middot;").addUprightStd(QString(3, QChar(0xB7)));
+        { auto s=UnicodeSymbol(QChar(0x2103)).addUprightStd("°C").addUprightHtml("&deg;C");
+            symbols["celsius"]=s; symbols["degC"]=s; symbols["degreeCelsius"]=s; }
+        symbols["ell"]=UprightSymbolUnicode(QChar(0x2113), "&ell;");
+        symbols["wp"]=UprightSymbolUnicode(QChar(0x2118), "&wp;").addGlobalFlags(SubscriptCorrection);
+        symbols["mho"]=UprightSymbolUnicode(QChar(0x2127), "&mho;");
+        symbols["lozenge"]=UprightSymbolUnicode(QChar(0x25CA), "&loz;");
+        symbols["cent"]=SimpleTextSymbol(QChar(0xA2), "&cent;");
+        symbols["checkmark"]=UprightSymbolStd(QChar(0x2713)).addUprightHtml("&check;");
+        symbols["circ"]=UprightSymbolStd(QChar(0x2218)).addUprightHtml("&SmallCircle;").addStd("o", ItalicOff,0.7, -0.25);
+        symbols["co"]=UprightSymbolUnicode(QChar(0x2105));
+        { auto s=SimpleTextSymbol(QChar(0xA9), "&copy;");
+            symbols["copyright"]=s; symbols["textcopyright"]=s; symbols["circledC"]=s; }
+        { auto s=UprightSymbolUnicode(QChar(0x2020)).addUprightHtml("&dagger;");
+            symbols["dagger"]=s; symbols["dag"]=s; symbols["textdagger"]=s; }
+        { auto s=UprightSymbolUnicode(QChar(0x2021)).addUprightHtml("&ddagger;");
+            symbols["ddagger"]=s; symbols["ddag"]=s; symbols["textdaggerdbl"]=s; }
+        { auto s=UnicodeSymbol(QChar(0x2138)).addHtml("&daleth;");
+            symbols["dalet"]=s; symbols["Dalet"]=s; symbols["daleth"]=s; symbols["Daleth"]=s; }
+        symbols["dd"] = SymbolFullProps(SymbolProps("d", Upright|BoldOff), "d", Upright|BoldOff);
+        symbols["diamond"]=UprightSymbolUnicode(QChar(0x22C4)).addHtml("&diam;").addWinSymbol(QChar(0xE0));
+        symbols["dollar"]=UnicodeSymbol(QChar(0x0024));
+        { auto s=SimpleTextSymbol(QChar(0x24), "&dollar;");
+            symbols["dollar"]=s; symbols["$"]=s; }
+        symbols["dprime"]=UnicodeSymbol(QChar(0x2033)).addHtml("&Prime;").addStd("''");
+        symbols["complement"] = SymbolFullProps(SymbolProps("C", Upright|BoldOff), "C", Upright|BoldOff).addUnicode(QChar(0x2201), Upright|BoldOff);
+        symbols["ee"] = SymbolFullProps(SymbolProps("e", Upright|BoldOff), "e", Upright|BoldOff);
+        { auto s=UnicodeSymbol(QChar(0x2026)).addHtml("&mldr;").addWinSymbol(QChar(0xBC)).addStd("...");
+            symbols["ellipsis"]=s; symbols["dots"]=s; symbols["ldots"]=s; }
+        { auto s=SimpleTextSymbol(QChar(0x20AC), "&euro;");
+            symbols["euro"]=s; symbols["EUR"]=s; }
+        { auto s=UnicodeSymbol(QChar(0x2109));
+            symbols["fahrenheit"]=s; symbols["degF"]=s; }
+        symbols["female"]=UnicodeSymbol(QChar(0x2640)).addHtml("&female;");
+        symbols["flq"]=UnicodeSymbol(QChar(0x2039)).addHtml("&lsaquo;").addStd("<");
+        symbols["flqq"]=UnicodeSymbol(QChar(0x00AB)).addHtml("&laquo;").addStd(QChar(0xAB));
+        //symbols["frown"]=UnicodeSymbol(QChar(0x2322)).addHtml("&frown;");
+        symbols["frq"]=UnicodeSymbol(QChar(0x203A)).addHtml("&rsaquo;").addStd(">");
+        symbols["frqq"]=UnicodeSymbol(QChar(0x00BB)).addHtml("&raquo;").addStd(QChar(0xBB));
+        { auto s=UnicodeSymbol(QChar(0x2137)).addHtml("&gimel;");
+            symbols["gimel"]=s; symbols["Gimel"]=s; }
+        symbols["glq"]=UnicodeSymbol(QChar(0x2018)).addHtml("&OpenCurlyQuote;").addStd("'");
+        symbols["glqq"]=UnicodeSymbol(QChar(0x201C)).addHtml("&OpenCurlyDoubleQuote;").addStd("\"");
+        symbols["grq"]=UnicodeSymbol(QChar(0x2019)).addHtml("&CloseCurlyQuote;").addStd("'");
+        symbols["grqq"]=UnicodeSymbol(QChar(0x201D)).addHtml("&CloseCurlyDoubleQuote;").addStd("\"");
+        symbols["hbar"]=UprightSymbolUnicode(QChar(0x210F)).addUprightHtml("&hbar;").addStd("h", ItalicOn|DrawLeftHBar).addGlobalFlags(SubscriptCorrection);
+        symbols["hexagon"]=UprightSymbolUnicode(QChar(0x2394));
+        symbols["ii"] = SymbolFullProps(SymbolProps("i", Upright|BoldOff), "i", Upright|BoldOff);
+        symbols["infty"]=UprightSymbolUnicode(QChar(0x221E)).addUprightHtml("&infin;").addUprightWinSymbol(QChar(0xA5)).addUprightStd("8", RotateSymbol90);
+        symbols["langle"]=UprightSymbolUnicode(QChar(0x2329)).addWinSymbol(QChar(0xE1));
+        symbols["lceil"]=UprightSymbolUnicode(QChar(0x2308)).addUprightHtml("&LeftCeiling;").addUprightWinSymbol(QChar(0xE9));
+        symbols["lfloor"]=UprightSymbolUnicode(QChar(0x230A)).addUprightHtml("&LeftFloor;").addUprightWinSymbol(QChar(0xEB));
+        symbols["lightning"]=UnicodeSymbol(QChar(0x21AF));
+        symbols["male"]=UnicodeSymbol(QChar(0x2642)).addHtml("&male;");
+        symbols["measuredangle"]=UprightSymbolUnicode(QChar(0x2221)).addUprightHtml("&measuredangle;");
+        symbols["micro"] = SimpleTextSymbol(QChar(0xB5), "&micro;");
+        symbols["ohm"]=UprightSymbolUnicode(QChar(0x2126)).addUprightHtml("&Omega;").addUprightWinSymbol(QChar(0x57));
+        symbols["partial"]=UprightSymbolUnicode(QChar(0x2202)).addUprightHtml("&part;").addUprightWinSymbol(QChar(0xB6));
+        { auto s=UnicodeSymbol(QChar(0x2030)).addHtml("&permil;");
+            symbols["perthousand"]=s; symbols["permil"]=s; }
+        symbols["pound"]=SimpleTextSymbol(QChar(0xA3), "&pound;");
+        symbols["pound"]=UnicodeSymbol(QChar(0x00A3));
+        symbols["prime"]=UnicodeSymbol(QChar(0x2032)).addHtml("&prime;").addStd("'");
+        symbols["arcminute"]=UnicodeSymbol(QChar(0x2032)).addHtml("&prime;").addStd("'");
+        symbols["arcsecond"]=UnicodeSymbol(QChar(0x2033)).addHtml("&dprime;").addStd("'");
+        symbols["rangle"]=UprightSymbolUnicode(QChar(0x232A)).addUprightWinSymbol(QChar(0xF1));
+        symbols["rceil"]=UprightSymbolUnicode(QChar(0x2309)).addUprightHtml("&RightCeiling;").addUprightWinSymbol(QChar(0xF9));
+        { auto s=SimpleTextSymbol(QChar(0xAE), "&reg;");
+            symbols["registered"]=s; symbols["textregistered"]=s; symbols["circledR"]=s; }
+        symbols["rfloor"]=UprightSymbolUnicode(QChar(0x230B)).addUprightHtml("&RightFloor;").addUprightWinSymbol(QChar(0xFB));
+        symbols["rightangle"]=UprightSymbolUnicode(QChar(0x221F)).addUprightHtml("&angrt;");
+        //symbols["smile"]=UprightSymbolUnicode(QChar(0x2323)).addUprightHtml("&smile;");
+        symbols["sphericalangle"]=UprightSymbolUnicode(QChar(0x2222)).addUprightHtml("&angsph;");
+        symbols["star"]=UprightSymbolUnicode(QChar(0x22C6));
+        symbols["tcohm"]=UnicodeSymbol(QChar(0x2126));
+        { auto s=UnicodeSymbol(QChar(0x2014), "&#11840;");
+            symbols["dblhyphen"]=s; symbols["textdblhyphen"]=s; symbols["textdblhyphenchar"]=s; }
+        { auto s=UnicodeSymbol(QChar(0x2014), "&mdash;");
+            symbols["---"]=s; symbols["textemdash"]=s; symbols["emdash"]=s; }
+        { auto s=UnicodeSymbol(QChar(0x2013), "&ndash;");
+            symbols["--"]=s; symbols["textendash"]=s; symbols["endash"]=s; }
+        { auto s=SimpleTextSymbol("-");
+            symbols["texthyphen"]=s; symbols["hyphen"]=s; }
+        symbols["textbar"]=SimpleTextSymbol("|", "&VerticalLine;");
+        { auto s=SimpleTextSymbol(QChar(0xB0), "&deg;");
+            symbols["textdegree"]=s; symbols["degree"] = s; }
+        symbols["textgreater"]=SimpleTextSymbol(">", "&gt;");
+        symbols["textless"]=SimpleTextSymbol("<", "&lt;");
+        symbols["textquestiondown"]=SimpleTextSymbol(QChar(0xBF), "&iquest;");
+        symbols["textexclamdown"]=SimpleTextSymbol(QChar(0xA1), "&iexcl;");
+        { auto s=UnicodeSymbol(QChar(0x231C));
+            symbols["tlcorner"]=s; symbols["ulcorner"]=s; }
+        symbols["trademark"]=UnicodeSymbol(QChar(0x2122)).addHtml("&trade;").addWinSymbol(QChar(0xD4)).addStd("(TM)");
+        symbols["trapezium"]=UnicodeSymbol(QChar(0x23E2)).addHtml("&trpezium;");
+        { auto s=UprightSymbolUnicode(QChar(0x231D));
+            symbols["trcorner"]=s; symbols["urcorner"]=s; }
+        symbols["trprime"]=UnicodeSymbol(QChar(0x2034)).addHtml("&tprime;").addStd("'''");
+        symbols["varcarriagereturn"]=UnicodeSymbol(QChar(0x23CE)).addWinSymbol(QChar(0xBF));
+        symbols["varhexagonlrbonds"]=UnicodeSymbol(QChar(0x232C));
+        symbols["yen"]=SimpleTextSymbol(QChar(0xA5), "&yen;");
+
+
+
+
+
+        /**************************************************************************************
+         * STANDARD MathOperator Strings
+         **************************************************************************************/
+        symbols["Pr"] = NarrowMathOperatorText("Pr");
+        symbols["acos"] = NarrowMathOperatorText("acos");
+        symbols["arccos"] = NarrowMathOperatorText("arccos");
+        symbols["arcsin"] = NarrowMathOperatorText("arcsin");
+        symbols["arctan"] = NarrowMathOperatorText("arctan");
+        symbols["arg"] = NarrowMathOperatorText("arg").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["argmax"] = NarrowMathOperatorText("arg max", "arg&thinsp;max").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["argmin"] = NarrowMathOperatorText("arg min", "arg&thinsp;min").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["asin"] = NarrowMathOperatorText("asin");
+        symbols["atan"] = NarrowMathOperatorText("atan");
+        symbols["cos"] = NarrowMathOperatorText("cos");
+        symbols["cosh"] = NarrowMathOperatorText("cosh");
+        symbols["cot"] = NarrowMathOperatorText("cot");
+        symbols["coth"] = NarrowMathOperatorText("coth");
+        symbols["coth"] = NarrowMathOperatorText("coth");
+        symbols["deg"] = NarrowMathOperatorText("deg");
+        symbols["det"] = NarrowMathOperatorText("det");
+        symbols["dim"] = NarrowMathOperatorText("dim");
+        symbols["exp"] = NarrowMathOperatorText("exp");
+        symbols["gcd"] = NarrowMathOperatorText("gcd");
+        symbols["hom"] = NarrowMathOperatorText("hom");
+        symbols["ker"] = NarrowMathOperatorText("ker");
+        symbols["lb"] = NarrowMathOperatorText("lb");
+        symbols["ld"] = NarrowMathOperatorText("ld");
+        symbols["lim"] = NarrowMathOperatorText("lim").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["liminf"] = NarrowMathOperatorText("lim inf", "lim&thinsp;inf").addGlobalFlags(SubSuperscriptBelowAboveSymbol).addGlobalFlags(SubscriptCorrection);
+        symbols["limsup"] = NarrowMathOperatorText("lim sup", "lim&thinsp;sup").addGlobalFlags(SubSuperscriptBelowAboveSymbol).addGlobalFlags(SubscriptCorrection);
+        symbols["ln"] = NarrowMathOperatorText("ln");
+        symbols["log"] = NarrowMathOperatorText("log");
+        symbols["max"] = NarrowMathOperatorText("max");
+        symbols["median"] = NarrowMathOperatorText("median");
+        symbols["min"] = NarrowMathOperatorText("min");
+        symbols["mod"] = NarrowMathOperatorText("mod");
+        symbols["sec"] = NarrowMathOperatorText("sec");
+        symbols["sgn"] = NarrowMathOperatorText("sgn");
+        symbols["sign"] = NarrowMathOperatorText("sign");
+        symbols["sin"] = NarrowMathOperatorText("sin");
+        symbols["sinh"] = NarrowMathOperatorText("sinh");
+        symbols["tan"] = NarrowMathOperatorText("tan");
+        symbols["tanh"] = NarrowMathOperatorText("tanh");
+
+        /**************************************************************************************
+         * STANDARD MathOperator Symbols
+         **************************************************************************************/
+        { auto s=MathOperatorSymbolUnicode(QChar(0x2217)).addMathOperatorStd("*").addMathOperatorHtml("*");
+            symbols["*"]=s; symbols["ast"]=s; symbols["asterisk"]=s; }
+        symbols["/"]=NarrowMathOperatorSymbolStd("/");
+        symbols["+"]=MathOperatorSymbolUnicode(QChar(0x2B)).addMathOperatorHtml("+").addMathOperatorStd("+");
+        symbols["-"]=MathOperatorSymbolUnicode(QChar(0x2212)).addMathOperatorHtml("-").addMathOperatorStd("-");
+        symbols["<"]=MathOperatorSymbol("<", "&lt;");
+        symbols["="]=MathOperatorSymbol("=");
+        symbols[">"]=MathOperatorSymbol(">", "&gt;");
+        symbols["Downarrow"]=UprightSymbolUnicode(QChar(0x21D3)).addUprightHtml("&DoubleDownArrow;").addUprightWinSymbol(QChar(0xDF));
+        symbols["Leftarrow"]=UprightSymbolUnicode(QChar(0x21D0)).addUprightHtml("&DoubleLeftArrow;").addUprightWinSymbol(QChar(0xDC));
+        symbols["Rightarrow"]=UprightSymbolUnicode(QChar(0x21D2)).addUprightHtml("&Rightarrow;").addUprightWinSymbol(QChar(0xDE));
+        symbols["Uparrow"]=UprightSymbolUnicode(QChar(0x21D1)).addUprightHtml("&DoubleUpArrow;").addUprightWinSymbol(QChar(0xDD));
+        symbols["Updownarrow"]=UprightSymbolUnicode(QChar(0x21D5)).addUprightHtml("&Updownarrow;");
+        symbols["approx"]=MathOperatorSymbolUnicode(QChar(0x2248)).addMathOperatorHtml("&asymp;").addMathOperatorWinSymbol(QChar(0xBB));
+        symbols["bbC"]=UnicodeSymbol(QChar(0x2102));
+        symbols["bbH"]=UnicodeSymbol(QChar(0x210D));
+        symbols["bbN"]=UnicodeSymbol(QChar(0x2115));
+        symbols["bbP"]=UnicodeSymbol(QChar(0x2119));
+        symbols["bbQ"]=UnicodeSymbol(QChar(0x211A));
+        symbols["bbR"]=UnicodeSymbol(QChar(0x211D));
+        symbols["bbZ"]=UnicodeSymbol(QChar(0x2124));
+        symbols["because"]=MathOperatorSymbolUnicode(QChar(0x2235)).addMathOperatorHtml("&because;");
+        symbols["bigcap"]=NarrowMathOperatorSymbolUnicode(QChar(0x22C2)).addMathOperatorHtml("&Intersection;").addMathOperatorWinSymbol(QChar(0xC7), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["bigcup"]=NarrowMathOperatorSymbolUnicode(QChar(0x22C3)).addMathOperatorHtml("&xcup;").addMathOperatorWinSymbol(QChar(0xC8), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        { auto s=NarrowMathOperatorSymbolUnicode(QChar(0x22C0)).addMathOperatorHtml("&Wedge;").addMathOperatorWinSymbol(QChar(0xD9), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+            symbols["bigwedge"]=s; symbols["bighat"]=s; }
+        symbols["bigvee"]=NarrowMathOperatorSymbolUnicode(QChar(0x22C1)).addMathOperatorHtml("&xvee;").addMathOperatorWinSymbol(QChar(0xDA), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["bigotimes"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A02)).addMathOperatorHtml("&bigotimes;").addMathOperatorWinSymbol(QChar(0xC4), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["bigoplus"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A01)).addMathOperatorHtml("&bigoplus;").addMathOperatorWinSymbol(QChar(0xC5), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["bigodot"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A00)).addMathOperatorHtml("&bigodot;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["biguplus"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A04)).addMathOperatorHtml("&biguplus;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["bigsqcup"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A06)).addMathOperatorHtml("&bigsqcup;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        { auto s=MathOperatorSymbolUnicode(QChar(0x22A5)).addMathOperatorHtml("&UpTee;");
+            symbols["bot"]=s; symbols["perp"]=s; }
+        { auto s=MathOperatorSymbolUnicode(QChar(0x2229)).addMathOperatorHtml("&cap;").addMathOperatorWinSymbol(QChar(0xC7));
+            symbols["cap"]=s; symbols["land"]=s; }
+        symbols["cdot"]=MathOperatorSymbol(QChar(0xB7)).addMathOperatorHtml("&middot;").addMathOperatorWinSymbol(QChar(0xD7));
+        symbols["cong"]=MathOperatorSymbolUnicode(QChar(0x2245)).addMathOperatorHtml("&TildeFullEqual;");
+        symbols["coprod"]=NarrowMathOperatorSymbolUnicode(QChar(0x2210)).addMathOperatorHtml("&Coproduct;").addWinSymbol(QChar(0xD5), ItalicOff|BoldOff|FlipSymbolUpDown, 1.8, 0.1).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        { auto s=MathOperatorSymbolUnicode(QChar(0x222A)).addMathOperatorHtml("&cup;").addMathOperatorWinSymbol(QChar(0xC8));
+            symbols["cup"]=s; symbols["lor"]=s; }
+        symbols["ddots"]=UprightSymbolUnicode(QChar(0x22F1)).addMathOperatorHtml("&dtdot;");
+        symbols["div"]=MathOperatorSymbolUnicode(QChar(0x00F7)).addMathOperatorHtml("&div;").addMathOperatorWinSymbol(QChar(0xB8));
+        symbols["downarrow"]=UprightSymbolUnicode(QChar(0x2193)).addUprightHtml("&ShortDownArrow;").addUprightWinSymbol(QChar(0xAF));
+        symbols["downharpoonleft"]=UprightSymbolUnicode(QChar(0x21C3)).addUprightHtml("&LeftDownVector;");
+        symbols["downharpoonright"]=UprightSymbolUnicode(QChar(0x21C2)).addUprightHtml("&RightDownVector;");
+        { auto s=MathOperatorSymbolUnicode(QChar(0x2205)).addMathOperatorHtml("&varnothing;").addMathOperatorWinSymbol(QChar(0xC6)).addStd("0", BoldOff|ItalicOff|DrawSlash);
+            symbols["emptyset"]=s; symbols["varnothing"]=s; }
+        symbols["equiv"]=MathOperatorSymbolUnicode(QChar(0x2261)).addMathOperatorHtml("&equiv;").addMathOperatorWinSymbol(QChar(0xBA));
+        symbols["exists"]=NarrowMathOperatorSymbolUnicode(QChar(0x2203)).addMathOperatorHtml("&exist;").addMathOperatorWinSymbol(QChar(0x24)).addStd("E", ItalicOff|BoldOff|FlipSymbolLeftRight);
+        symbols["forall"]=NarrowMathOperatorSymbolUnicode(QChar(0x2200)).addMathOperatorHtml("&forall;").addMathOperatorWinSymbol(QChar(0x22)).addStd("A", ItalicOff|BoldOff|FlipSymbolUpDown).addGlobalFlags(SubscriptCorrection);
+        { auto s=MathOperatorSymbolUnicode(QChar(0x2265)).addMathOperatorHtml("&GreaterEqual;").addMathOperatorWinSymbol(QChar(0xB3));
+            symbols["geq"]=s; symbols["ge"]=s; }
+        symbols["geqq"]=MathOperatorSymbolUnicode(QChar(0x2267)).addMathOperatorHtml("&GreaterFullEqual;");
+        symbols["gg"]=MathOperatorSymbolUnicode(QChar(0x226B)).addMathOperatorHtml("&NestedGreaterGreater;").addMathOperatorStd(">>");
+        symbols["iddots"]=UprightSymbolUnicode(QChar(0x22F0)).addMathOperatorHtml("&utdot;");
+        { auto s=UprightSymbolUnicode(QChar(0x21D4)).addUprightHtml("&DoubleLeftRightArrow;").addUprightWinSymbol(QChar(0xDB));
+            symbols["iff"]=s; symbols["Leftrightarrow"]=s; }
+        symbols["iiint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222D)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&tint;").addMathOperatorWinSymbol(QString(3, QChar(0xF2)), 1.8, 0.1);
+        symbols["iint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222C)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&Int;").addMathOperatorWinSymbol(QString(2, QChar(0xF2)), 1.8, 0.1);
+        symbols["in"]=MathOperatorSymbolUnicode(QChar(0x2208)).addMathOperatorHtml("&isin;").addMathOperatorWinSymbol(QChar(0xCE));
+        symbols["int"]=NarrowMathOperatorSymbolUnicode(QChar(0x222B)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&int;").addMathOperatorWinSymbol(QChar(0xF2), 1.8, 0.1);
+        symbols["leftarrow"]=UprightSymbolUnicode(QChar(0x2190)).addUprightHtml("&larr;").addUprightWinSymbol(QChar(0xAC));
+        symbols["longleftarrow"]=UprightSymbolUnicode(QChar(0x27F5)).addUprightHtml("&longleftarrow;");
+        symbols["longrightarrow"]=UprightSymbolUnicode(QChar(0x27F6)).addUprightHtml("&longrightarrow;");
+        symbols["longleftrightarrow"]=UprightSymbolUnicode(QChar(0x27F7)).addUprightHtml("&longleftrightarrow;");
+        symbols["Longleftarrow"]=UprightSymbolUnicode(QChar(0x27F8)).addUprightHtml("&DoubleLongLeftArrow;");
+        symbols["Longrightarrow"]=UprightSymbolUnicode(QChar(0x27F9)).addUprightHtml("&DoubleLongRightArrow;");
+        symbols["Longleftrightarrow"]=UprightSymbolUnicode(QChar(0x27FA)).addUprightHtml("&Longleftrightarrow;");
+        symbols["leftharpoondown"]=UprightSymbolUnicode(QChar(0x21BD)).addUprightHtml("&leftharpoondown;");
+        symbols["leftharpoonup"]=UprightSymbolUnicode(QChar(0x21BC)).addUprightHtml("&LeftVector;");
+        symbols["leftrightarrow"]=UprightSymbolUnicode(QChar(0x2194)).addUprightHtml("&harr;").addUprightWinSymbol(QChar(0xAB));
+        symbols["leftrightharpoon"]=UprightSymbolUnicode(QChar(0x21CB)).addUprightHtml("&ReverseEquilibrium;");
+        { auto s=MathOperatorSymbolUnicode(QChar(0x2264)).addMathOperatorHtml("&leq;").addMathOperatorWinSymbol(QChar(0xA3));
+            symbols["leq"]=s; symbols["le"]=s; }
+        symbols["leqq"]=MathOperatorSymbolUnicode(QChar(0x2266)).addMathOperatorHtml("&LessFullEqual;");
+        symbols["ll"]=MathOperatorSymbolUnicode(QChar(0x226A)).addMathOperatorHtml("&NestedLessLess;").addMathOperatorStd("<<");
+        symbols["lnot"]=MathOperatorSymbolUnicode(QChar(0xAC)).addMathOperatorWinSymbol(QChar(0xD8)).addMathOperatorHtml("&not;");
+        symbols["mapimage"]=MathOperatorSymbolUnicode(QChar(0x22B7)).addMathOperatorHtml("&imof;");
+        symbols["maporiginal"]=MathOperatorSymbolUnicode(QChar(0x22B6)).addMathOperatorHtml("&origof;");
+        symbols["mapsto"]=MathOperatorSymbolUnicode(QChar(0x21A6)).addMathOperatorHtml("&RightTeeArrow;");
+        symbols["mid"]=MathOperatorSymbolUnicode(QChar(0x2223)).addMathOperatorHtml("&VerticalBar;").addMathOperatorWinSymbol(QChar(0xBD)).addMathOperatorStd("|");
+        symbols["mp"]=MathOperatorSymbolUnicode(QChar(0x2213)).addMathOperatorHtml("&mp;").addWinSymbol(QChar(0xB1),ItalicOff|BoldOff|FlipSymbolUpDown).addStd(QChar(0xB1),ItalicOff|BoldOff|FlipSymbolUpDown);
+        symbols["multimap"]=MathOperatorSymbolUnicode(QChar(0x22B8)).addMathOperatorHtml("&mumap;");
+        symbols["nabla"]=NarrowMathOperatorSymbolUnicode(QChar(0x2207)).addMathOperatorHtml("&nabla;").addMathOperatorWinSymbol(QChar(0xD1)).addGlobalFlags(IntLikeSymbolCorrection);
+        symbols["ne"]=NarrowMathOperatorSymbolUnicode(QChar(0x2260)).addMathOperatorHtml("&ne;").addMathOperatorWinSymbol(QChar(0xB9));
+        symbols["nearrow"]=UprightSymbolUnicode(QChar(0x2197)).addUprightHtml("&UpperRightArrow;");
+        { auto s=MathOperatorSymbolUnicode(QChar(0x00AC)).addMathOperatorHtml("&not;").addMathOperatorWinSymbol(QChar(0xD8));
+            symbols["neg"]=s; symbols["lnot"]=s; }
+        symbols["neq"]=MathOperatorSymbolUnicode(QChar(0x2260)).addMathOperatorHtml("&ne;").addMathOperatorWinSymbol(QChar(0xB9)).addStd("=", ItalicOff|BoldOff|DrawSlash);
+        symbols["nexists"]=NarrowMathOperatorSymbolUnicode(QChar(0x2204)).addMathOperatorHtml("&NotExists;").addStd("E", ItalicOff|BoldOff|FlipSymbolLeftRight|DrawSlash).addMathOperatorWinSymbol(QChar(0x24), ItalicOff|BoldOff|DrawSlash);
+        symbols["ni"]=NarrowMathOperatorSymbolUnicode(QChar(0x220B)).addMathOperatorHtml("&ReverseElement;").addMathOperatorWinSymbol(QChar(0xCE), ItalicOff|BoldOff|FlipSymbolLeftRight);
+        symbols["nmid"]=NarrowMathOperatorSymbolUnicode(QChar(0x2224)).addMathOperatorHtml("&NotVerticalBar;");
+        symbols["notin"]=NarrowMathOperatorSymbolUnicode(QChar(0x2209)).addMathOperatorHtml("&notin;").addMathOperatorWinSymbol(QChar(0xCF));
+        symbols["notni"]=NarrowMathOperatorSymbolUnicode(QChar(0x220C)).addMathOperatorHtml("&NotReverseElement;");
+        symbols["nparallel"]=MathOperatorSymbolUnicode(QChar(0x2226)).addMathOperatorHtml("&NotDoubleVerticalBar;");
+        symbols["nwarrow"]=UprightSymbolUnicode(QChar(0x2196)).addUprightHtml("&UpperLeftArrow;");
+        symbols["odot"]=MathOperatorSymbolUnicode(QChar(0x2299)).addMathOperatorHtml("&odot;");
+        symbols["oiiint"]=NarrowMathOperatorSymbolUnicode(QChar(0x2230)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&Cconint;");
+        symbols["oiint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222F)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&DoubleContourIntegral;");
+        symbols["oint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222E)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&ContourIntegral;");
+        symbols["ominus"]=MathOperatorSymbolUnicode(QChar(0x2296)).addMathOperatorHtml("&ominus;");
+        symbols["oplus"]=MathOperatorSymbolUnicode(QChar(0x2295)).addMathOperatorHtml("&CirclePlus;").addMathOperatorWinSymbol(QChar(0xC5));
+        symbols["oslash"]=MathOperatorSymbolUnicode(QChar(0x2298)).addMathOperatorHtml("&osol;");
+        symbols["otimes"]=MathOperatorSymbolUnicode(QChar(0x2297)).addMathOperatorHtml("&CircleTimes;").addMathOperatorWinSymbol(QChar(0xC4));
+        symbols["parallel"]=NarrowMathOperatorSymbolUnicode(QChar(0x2225)).addMathOperatorHtml("&shortparallel;").addMathOperatorStd("||");
+        symbols["pm"] = MathOperatorSymbol(QChar(0xB1), "&plusmn;").addMathOperatorWinSymbol(QChar(0xB1));
+        symbols["prec"]=MathOperatorSymbolUnicode(QChar(0x227A)).addMathOperatorHtml("&prec;");
+        symbols["prod"]=NarrowMathOperatorSymbolUnicode(QChar(0x220F)).addMathOperatorWinSymbol(QChar(0xD5), 1.8, 0.1).addMathOperatorHtml("&prod;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["propto"]=MathOperatorSymbolUnicode(QChar(0x221D)).addMathOperatorWinSymbol(QChar(0xB5)).addMathOperatorHtml("&Proportional;");
+        symbols["rightharpoondown"]=UprightSymbolUnicode(QChar(0x21C1)).addUprightHtml("&rightharpoondown;");
+        symbols["rightharpoonup"]=UprightSymbolUnicode(QChar(0x21C0)).addUprightHtml("&RightVector;");
+        symbols["rightleftharpoon"]=UprightSymbolUnicode(QChar(0x21CC)).addUprightHtml("&Equilibrium;");
+        symbols["searrow"]=UprightSymbolUnicode(QChar(0x2198)).addUprightHtml("&LowerRightArrow;");
+        symbols["setminus"]=MathOperatorSymbolUnicode(QChar(0x2216)).addMathOperatorHtml("&smallsetminus;");
+        { auto s=MathOperatorSymbolUnicode(QChar(0x223C)).addMathOperatorHtml("&tilde;").addMathOperatorStd("~");
+            symbols["~"]=s; symbols["sim"]=s; }
+        symbols["simeq"]=MathOperatorSymbolUnicode(QChar(0x2243)).addMathOperatorHtml("&TildeEqual;");
+        symbols["sqcap"]=MathOperatorSymbolUnicode(QChar(0x2293)).addMathOperatorHtml("&SquareIntersection;");
+        symbols["sqcup"]=MathOperatorSymbolUnicode(QChar(0x2294)).addMathOperatorHtml("&SquareUnion;");
+        symbols["square"]=MathOperatorSymbolUnicode(QChar(0x25A1));
+        symbols["subset"]=MathOperatorSymbolUnicode(QChar(0x2282)).addMathOperatorHtml("&sub;").addMathOperatorWinSymbol(QChar(0xCC));
+        symbols["subseteq"]=MathOperatorSymbolUnicode(QChar(0x2286)).addMathOperatorHtml("&SubsetEqual;").addMathOperatorWinSymbol(QChar(0xCD));
+        symbols["subsetnot"]=MathOperatorSymbolUnicode(QChar(0x2284)).addMathOperatorHtml("&nsub;").addMathOperatorWinSymbol(QChar(0xCB));
+        symbols["succ"]=MathOperatorSymbolUnicode(QChar(0x227B)).addMathOperatorHtml("&succ;");
+        symbols["sum"]=NarrowMathOperatorSymbolUnicode(QChar(0x2211)).addMathOperatorWinSymbol(QChar(0xE5), 1.8, 0.1).addMathOperatorHtml("&sum;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+        symbols["supset"]=MathOperatorSymbolUnicode(QChar(0x2283)).addMathOperatorHtml("&sup;").addMathOperatorWinSymbol(QChar(0xC9));
+        symbols["supseteq"]=MathOperatorSymbolUnicode(QChar(0x2287)).addMathOperatorHtml("&SupersetEqual;").addMathOperatorWinSymbol(QChar(0xCA));
+        symbols["supsetnot"]=MathOperatorSymbolUnicode(QChar(0x2285)).addMathOperatorHtml("&nsup;");
+        symbols["swarrow"]=UprightSymbolUnicode(QChar(0x2199)).addUprightHtml("&LowerLeftArrow;");
+        symbols["therefore"]=MathOperatorSymbolUnicode(QChar(0x2234)).addMathOperatorHtml("&therefore;").addMathOperatorWinSymbol(QChar(0x5C));
+        symbols["times"] = MathOperatorSymbol(QChar(0xD7), "&times;").addMathOperatorWinSymbol(QChar(0xB4));
+        { auto s=UprightSymbolUnicode(QChar(0x2192)).addUprightHtml("&rarr;").addUprightWinSymbol(QChar(0xAE));
+          symbols["to"]=s; symbols["rightarrow"]=s; }
+        symbols["top"]=MathOperatorSymbolUnicode(QChar(0x22A4)).addMathOperatorHtml("&top;").addMathOperatorWinSymbol(QChar(0x5E)).addUprightStd("T");
+        symbols["triangle"]=NarrowMathOperatorSymbolUnicode(QChar(0x2206));
+        symbols["uparrow"]=UprightSymbolUnicode(QChar(0x2191)).addUprightHtml("&ShortUpArrow;").addUprightWinSymbol(QChar(0xAD));
+        symbols["updownarrow"]=UprightSymbolUnicode(QChar(0x2195)).addUprightHtml("&updownarrow;");
+        symbols["upharpoonleft"]=UprightSymbolUnicode(QChar(0x21BF)).addUprightHtml("&LeftUpVector;");
+        symbols["upharpoonright"]=UprightSymbolUnicode(QChar(0x21BE)).addUprightHtml("&RightUpVector;");
+        symbols["vartriangleleft"]=NarrowMathOperatorSymbolUnicode(QChar(0x22B2)).addMathOperatorHtml("&LeftTriangle;");
+        symbols["vdots"]=UprightSymbolUnicode(QChar(0x22EE)).addMathOperatorHtml("&vellip;");
+        symbols["vee"]=MathOperatorSymbolUnicode(QChar(0x2228)).addMathOperatorHtml("&vee;").addMathOperatorWinSymbol(QChar(0xDA));
+        symbols["vdash"]=MathOperatorSymbolUnicode(QChar(0x22A2)).addMathOperatorHtml("&vdash;");
+        symbols["dashv"]=MathOperatorSymbolUnicode(QChar(0x22A3)).addMathOperatorHtml("&dashv;");
+        symbols["vDash"]=MathOperatorSymbolUnicode(QChar(0x22A8)).addMathOperatorHtml("&DoubleRightTee;");
+        symbols["nvdash"]=MathOperatorSymbolUnicode(QChar(0x22AC)).addMathOperatorHtml("&nvdash;");
+        symbols["Vdash"]=MathOperatorSymbolUnicode(QChar(0x22A9)).addMathOperatorHtml("&Vdash;");
+        symbols["models"]=MathOperatorSymbolUnicode(QChar(0x22A7)).addMathOperatorHtml("&models;");
+        symbols["wedge"]=MathOperatorSymbolUnicode(QChar(0x2227)).addMathOperatorHtml("&wedge;").addMathOperatorWinSymbol(QChar(0xD9));
+
+
+
+        /**************************************************************************************
+         * GREEK letters
+         **************************************************************************************/
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "alpha", "a", QChar(0x3B1), "&alpha;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "beta", "b", QChar(0x3B2), "&beta;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "gamma", "g", QChar(0x3B3), "&gamma;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "delta", "d", QChar(0x3B4), "&delta;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "epsilon", "e", QChar(0x3F5), "&varepsilon;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "varepsilon", "e", QChar(0x3B5), "&epsi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "zeta", "z", QChar(0x3B6),"&zeta;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "eta", "h", QChar(0x3B7),"&eta;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "theta", "q", QChar(0x3B8),"&theta;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "vartheta", "J", QChar(0x3D1),"&thetasym;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "iota", "i", QChar(0x3B9),"&iota;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "kappa", "k", QChar(0x3BA),"&kappa;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "lambda", "l", QChar(0x3BB),"&lambda;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "mu", "m", QChar(0x3BC),"&mu;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "nu", "n", QChar(0x3BD),"&nu;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "xi", "x", QChar(0x3BE),"&xi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "pi", "p", QChar(0x3C0),"&pi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "varpi", "v", QChar(0x3D6),"&piv;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "rho", "r", QChar(0x3C1),"&rho;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "varrho", "r", QChar(0x3F1),"&varrho;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "sigma", "s", QChar(0x3C3),"&sigma;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "varsigma", "V", QChar(0x3C2),"&varsigma;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "tau", "t", QChar(0x3C4),"&tau;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "upsilon", "u", QChar(0x3C5),"&upsilon;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "phi", "f", QChar(0x3C5),"&straightphi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "varphi", "j", QChar(0x3D6),"&phi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "chi", "c", QChar(0x3C7),"&chi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "psi", "y", QChar(0x3C8),"&psi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "omega", "w", QChar(0x3C9),"&omega;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Gamma", "G", QChar(0x3A3),"&Gamma;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Delta", "D", QChar(0x394),"&Delta;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Theta", "Q", QChar(0x398),"&Theta;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Lambda", "L", QChar(0x39B),"&Lambda;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Omega", "W", QChar(0x3A9),"&Omega;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Xi", "X", QChar(0x39E),"&Xi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Pi", "P", QChar(0x3A0),"&Pi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Sigma", "S", QChar(0x3A3),"&Sigma;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Upsilon", "U", QChar(0x3C6),"&Upsilon;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Phi", "F", QChar(0x3A6),"&Phi;");
+        addGreekLetterVariants_WinSymbol_Unicode_Html(symbols, "Psi", "Y", QChar(0x3A8),"&Psi;");
+
+
+        /**************************************************************************************
+         * SYMBOLS from special fonts
+         **************************************************************************************/
+    #if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
+            QFontDatabase fdb;
+            const auto fonts=fdb.families();
+    #else
+            const auto fonts=QFontDatabase::families();
+    #endif
+        if (fonts.contains("Wingdings")) {
+            { auto s=SymbolFullProps("Wingdings", QChar(0x46));
+            symbols["lefthand"]=s; symbols["HandRight"]=s;}
+            { auto s=SymbolFullProps("Wingdings", QChar(0x45));
+            symbols["righthand"]=s; symbols["HandLeft"]=s;}
+        }
+
+        return symbols;
+    }();
+    return s_symbols;
+
+}
+
 JKQTMathTextSymbolNode::SymbolFullProps JKQTMathTextSymbolNode::MathOperatorSymbolUnicode(const QString &unicode)
 {
     return SymbolFullProps(MTFEUnicode, SymbolProps(unicode, ItalicOff|BoldOff, 1.0, 0.0)).addGlobalFlags(ExtendWidthInMathmode|MakeWhitespaceHalf);
@@ -416,7 +843,7 @@ JKQTMathTextSymbolNode::SymbolFullProps JKQTMathTextSymbolNode::UprightGreekLett
     return SymbolFullProps(MTFEUnicode, SymbolProps(letterUnicode, ItalicOff), MTFEWinSymbol, SymbolProps(letterWinSymbol, ItalicOff), html, ItalicOff);
 }
 
-void JKQTMathTextSymbolNode::addGreekLetterVariants_WinSymbol_Unicode_Html(const QString &baseInstructionName, const QString &letterWinSymbol, const QString &letterUnicode, const QString &html)
+void JKQTMathTextSymbolNode::addGreekLetterVariants_WinSymbol_Unicode_Html(QHash<QString, JKQTMathTextSymbolNode::SymbolFullProps>& symbols, const QString &baseInstructionName, const QString &letterWinSymbol, const QString &letterUnicode, const QString &html)
 {
     symbols[baseInstructionName]=MathGreekLetter_WinSymbol_Unicode_Html(letterWinSymbol, letterUnicode, html).addGlobalFlags(SubscriptCorrection);
     symbols["text"+baseInstructionName]=AsOutsiudeGreekLetter_WinSymbol_Unicode_Html(letterWinSymbol, letterUnicode, html);
@@ -488,437 +915,7 @@ JKQTMathTextSymbolNode::SymbolFullProps JKQTMathTextSymbolNode::SimpleUprightTex
 
 
 
-QHash<QString, JKQTMathTextSymbolNode::SymbolFullProps> JKQTMathTextSymbolNode::symbols=QHash<QString, JKQTMathTextSymbolNode::SymbolFullProps>();
 
-void JKQTMathTextSymbolNode::fillSymbolTables()
-{
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (symbols.size()>0) return; // tables have already been filled! So nothing to do here
-
-    /**************************************************************************************
-     * STANDARD Symbols available in all standard fonts
-     **************************************************************************************/
-    symbols["#"]=SimpleTextSymbol("#", "&num;");
-    symbols["%"]=SimpleTextSymbol("%", "&NestedGreaterGreater;");
-    symbols["&"]=SimpleTextSymbol("&", "&amp;");
-    symbols["("]=SimpleUprightTextSymbol("(");
-    symbols[")"]=SimpleUprightTextSymbol(")");
-    symbols["["]=SimpleUprightTextSymbol("[");
-    symbols["]"]=SimpleUprightTextSymbol("]");
-    symbols["_"]=SimpleTextSymbol("_");
-    symbols["{"]=SimpleUprightTextSymbol("{");
-    symbols["|"]=SimpleUprightTextSymbol("||", "&Vert;").addUprightUnicode(QChar(0x2016));
-    symbols["}"]=SimpleUprightTextSymbol("}");
-    symbols["AC"]=UprightSymbolUnicode(QChar(0x223F)).addUprightHtml("&acd;").addUprightStd("~");
-    symbols["circonflex"]=SimpleTextSymbol("^");
-    symbols["aa"]=SimpleTextSymbol(QChar(0xE5));
-    symbols["ae"]=SimpleTextSymbol(QChar(0xE6));
-    symbols["AE"]=SimpleTextSymbol(QChar(0xC6));
-    symbols["AA"]=SimpleTextSymbol(QChar(0xC5));
-    symbols["oe"]=UnicodeSymbol(QChar(0x153)).addStd("oe").addHtml("&oelig;");
-    symbols["OE"]=UnicodeSymbol(QChar(0x152)).addStd("OE").addHtml("&OElig;");
-    symbols["ss"]=SimpleTextSymbol(QChar(0xDF)).addHtml("&szlig;");
-    symbols["l"]=UnicodeSymbol(QChar(0x141)).addHtml("&lstrok;");
-    symbols["L"]=UnicodeSymbol(QChar(0x142)).addHtml("&Lstrok;");
-    symbols["o"]=SimpleTextSymbol(QChar(0xF8)).addHtml("&oslash;");
-    symbols["O"]=SimpleTextSymbol(QChar(0xD8)).addHtml("&Oslash;");
-    { auto s=UprightSymbolUnicode(QChar(0x212B)).addUprightStd(QChar(0xC5));
-      symbols["Angstrom"]=s; symbols["angstrom"]=s; }
-    { auto s=UnicodeSymbol(QChar(0x2136)).addHtml("&beth;");
-      symbols["Beth"]=s; symbols["Bet"]=s; symbols["beth"]=s; symbols["bet"]=s; }
-    symbols["Box"]=UprightSymbolUnicode(QChar(0x25A1));
-    symbols["DC"]=UnicodeSymbol(QChar(0x2393)).addWinSymbol(QChar(0xBB)).addStd("=");
-    symbols["EUR"]=UnicodeSymbol(QChar(0x20AC));
-    symbols["Im"]=UprightSymbolUnicode(QChar(0x2111)).addHtml("&image;").addWinSymbol(QChar(0xC1));
-    symbols["No"]=UnicodeSymbol(QChar(0x2116));
-    { auto s=UprightSymbolUnicode(QChar(0x2126)).addUprightWinSymbol("W").addUprightHtml("&Omega;");
-      symbols["Ohm"]=s; symbols["ohm"]=s; }
-    symbols["P"]=SimpleTextSymbol(QChar(0xB6)).addHtml("&para;");
-    symbols["Re"]=UnicodeSymbol(QChar(0x211C)).addHtml("&Rfr;").addWinSymbol(QChar(0xC2));
-    { auto s=SimpleTextSymbol(QChar(0xA7)).addHtml("&sect;");
-        symbols["S"]=s; symbols["§"]=s;}
-    symbols["accurrent"]=UnicodeSymbol(QChar(0x23E6));
-    { auto s=UnicodeSymbol(QChar(0x2135)).addHtml("&aleph;").addWinSymbol(QChar(0xC0));
-        symbols["alef"]=s; symbols["aleph"]=s; symbols["Aleph"]=s; symbols["Alef"]=s; }
-    symbols["angle"]=UprightSymbolUnicode(QChar(0x2220)).addHtml("&angle;").addWinSymbol(QChar(0xD0));
-    symbols["backslash"]=SimpleTextSymbol("\\");
-    symbols["benzene"]=UprightSymbolUnicode(QChar(0x232C));
-    symbols["benzenr"]=UprightSymbolUnicode(QChar(0x23E3));
-    symbols["blacksquare"]=UprightSymbolUnicode(QChar(0x220E)).addUprightHtml("&squ;");
-    { auto s=UprightSymbolUnicode(QChar(0x231E));
-        symbols["blcorner"]=s; symbols["llcorner"]=s; }
-    { auto s=UprightSymbolUnicode(QChar(0x231F));
-        symbols["brcorner"]=s; symbols["lrcorner"]=s; }
-    { auto s=UprightSymbolUnicode(QChar(0x2022)).addUprightHtml("&bull;").addUprightWinSymbol(QChar(0xB7));
-        symbols["bullet"]=s; symbols["textbullet"]=s; }
-    symbols["cdots"]=UprightSymbolUnicode(QChar(0x22EF)).addUprightHtml("&middot;&middot;&middot;").addUprightStd(QString(3, QChar(0xB7)));
-    { auto s=UnicodeSymbol(QChar(0x2103)).addUprightStd("°C").addUprightHtml("&deg;C");
-        symbols["celsius"]=s; symbols["degC"]=s; symbols["degreeCelsius"]=s; }
-    symbols["ell"]=UprightSymbolUnicode(QChar(0x2113), "&ell;");
-    symbols["wp"]=UprightSymbolUnicode(QChar(0x2118), "&wp;").addGlobalFlags(SubscriptCorrection);
-    symbols["mho"]=UprightSymbolUnicode(QChar(0x2127), "&mho;");
-    symbols["lozenge"]=UprightSymbolUnicode(QChar(0x25CA), "&loz;");
-    symbols["cent"]=SimpleTextSymbol(QChar(0xA2), "&cent;");
-    symbols["checkmark"]=UprightSymbolStd(QChar(0x2713)).addUprightHtml("&check;");
-    symbols["circ"]=UprightSymbolStd(QChar(0x2218)).addUprightHtml("&SmallCircle;").addStd("o", ItalicOff,0.7, -0.25);
-    symbols["co"]=UprightSymbolUnicode(QChar(0x2105));
-    { auto s=SimpleTextSymbol(QChar(0xA9), "&copy;");
-        symbols["copyright"]=s; symbols["textcopyright"]=s; symbols["circledC"]=s; }
-    { auto s=UprightSymbolUnicode(QChar(0x2020)).addUprightHtml("&dagger;");
-        symbols["dagger"]=s; symbols["dag"]=s; symbols["textdagger"]=s; }
-    { auto s=UprightSymbolUnicode(QChar(0x2021)).addUprightHtml("&ddagger;");
-        symbols["ddagger"]=s; symbols["ddag"]=s; symbols["textdaggerdbl"]=s; }
-    { auto s=UnicodeSymbol(QChar(0x2138)).addHtml("&daleth;");
-        symbols["dalet"]=s; symbols["Dalet"]=s; symbols["daleth"]=s; symbols["Daleth"]=s; }
-    symbols["dd"] = SymbolFullProps(SymbolProps("d", Upright|BoldOff), "d", Upright|BoldOff);
-    symbols["diamond"]=UprightSymbolUnicode(QChar(0x22C4)).addHtml("&diam;").addWinSymbol(QChar(0xE0));
-    symbols["dollar"]=UnicodeSymbol(QChar(0x0024));
-    { auto s=SimpleTextSymbol(QChar(0x24), "&dollar;");
-        symbols["dollar"]=s; symbols["$"]=s; }
-    symbols["dprime"]=UnicodeSymbol(QChar(0x2033)).addHtml("&Prime;").addStd("''");
-    symbols["complement"] = SymbolFullProps(SymbolProps("C", Upright|BoldOff), "C", Upright|BoldOff).addUnicode(QChar(0x2201), Upright|BoldOff);
-    symbols["ee"] = SymbolFullProps(SymbolProps("e", Upright|BoldOff), "e", Upright|BoldOff);
-    { auto s=UnicodeSymbol(QChar(0x2026)).addHtml("&mldr;").addWinSymbol(QChar(0xBC)).addStd("...");
-        symbols["ellipsis"]=s; symbols["dots"]=s; symbols["ldots"]=s; }
-    { auto s=SimpleTextSymbol(QChar(0x20AC), "&euro;");
-        symbols["euro"]=s; symbols["EUR"]=s; }
-    { auto s=UnicodeSymbol(QChar(0x2109));
-        symbols["fahrenheit"]=s; symbols["degF"]=s; }
-    symbols["female"]=UnicodeSymbol(QChar(0x2640)).addHtml("&female;");
-    symbols["flq"]=UnicodeSymbol(QChar(0x2039)).addHtml("&lsaquo;").addStd("<");
-    symbols["flqq"]=UnicodeSymbol(QChar(0x00AB)).addHtml("&laquo;").addStd(QChar(0xAB));
-    //symbols["frown"]=UnicodeSymbol(QChar(0x2322)).addHtml("&frown;");
-    symbols["frq"]=UnicodeSymbol(QChar(0x203A)).addHtml("&rsaquo;").addStd(">");
-    symbols["frqq"]=UnicodeSymbol(QChar(0x00BB)).addHtml("&raquo;").addStd(QChar(0xBB));
-    { auto s=UnicodeSymbol(QChar(0x2137)).addHtml("&gimel;");
-        symbols["gimel"]=s; symbols["Gimel"]=s; }
-    symbols["glq"]=UnicodeSymbol(QChar(0x2018)).addHtml("&OpenCurlyQuote;").addStd("'");
-    symbols["glqq"]=UnicodeSymbol(QChar(0x201C)).addHtml("&OpenCurlyDoubleQuote;").addStd("\"");
-    symbols["grq"]=UnicodeSymbol(QChar(0x2019)).addHtml("&CloseCurlyQuote;").addStd("'");
-    symbols["grqq"]=UnicodeSymbol(QChar(0x201D)).addHtml("&CloseCurlyDoubleQuote;").addStd("\"");
-    symbols["hbar"]=UprightSymbolUnicode(QChar(0x210F)).addUprightHtml("&hbar;").addStd("h", ItalicOn|DrawLeftHBar).addGlobalFlags(SubscriptCorrection);
-    symbols["hexagon"]=UprightSymbolUnicode(QChar(0x2394));
-    symbols["ii"] = SymbolFullProps(SymbolProps("i", Upright|BoldOff), "i", Upright|BoldOff);
-    symbols["infty"]=UprightSymbolUnicode(QChar(0x221E)).addUprightHtml("&infin;").addUprightWinSymbol(QChar(0xA5)).addUprightStd("8", RotateSymbol90);
-    symbols["langle"]=UprightSymbolUnicode(QChar(0x2329)).addWinSymbol(QChar(0xE1));
-    symbols["lceil"]=UprightSymbolUnicode(QChar(0x2308)).addUprightHtml("&LeftCeiling;").addUprightWinSymbol(QChar(0xE9));
-    symbols["lfloor"]=UprightSymbolUnicode(QChar(0x230A)).addUprightHtml("&LeftFloor;").addUprightWinSymbol(QChar(0xEB));
-    symbols["lightning"]=UnicodeSymbol(QChar(0x21AF));
-    symbols["male"]=UnicodeSymbol(QChar(0x2642)).addHtml("&male;");
-    symbols["measuredangle"]=UprightSymbolUnicode(QChar(0x2221)).addUprightHtml("&measuredangle;");
-    symbols["micro"] = SimpleTextSymbol(QChar(0xB5), "&micro;");
-    symbols["ohm"]=UprightSymbolUnicode(QChar(0x2126)).addUprightHtml("&Omega;").addUprightWinSymbol(QChar(0x57));
-    symbols["partial"]=UprightSymbolUnicode(QChar(0x2202)).addUprightHtml("&part;").addUprightWinSymbol(QChar(0xB6));
-    { auto s=UnicodeSymbol(QChar(0x2030)).addHtml("&permil;");
-        symbols["perthousand"]=s; symbols["permil"]=s; }
-    symbols["pound"]=SimpleTextSymbol(QChar(0xA3), "&pound;");
-    symbols["pound"]=UnicodeSymbol(QChar(0x00A3));
-    symbols["prime"]=UnicodeSymbol(QChar(0x2032)).addHtml("&prime;").addStd("'");
-    symbols["arcminute"]=UnicodeSymbol(QChar(0x2032)).addHtml("&prime;").addStd("'");
-    symbols["arcsecond"]=UnicodeSymbol(QChar(0x2033)).addHtml("&dprime;").addStd("'");
-    symbols["rangle"]=UprightSymbolUnicode(QChar(0x232A)).addUprightWinSymbol(QChar(0xF1));
-    symbols["rceil"]=UprightSymbolUnicode(QChar(0x2309)).addUprightHtml("&RightCeiling;").addUprightWinSymbol(QChar(0xF9));
-    { auto s=SimpleTextSymbol(QChar(0xAE), "&reg;");
-        symbols["registered"]=s; symbols["textregistered"]=s; symbols["circledR"]=s; }
-    symbols["rfloor"]=UprightSymbolUnicode(QChar(0x230B)).addUprightHtml("&RightFloor;").addUprightWinSymbol(QChar(0xFB));
-    symbols["rightangle"]=UprightSymbolUnicode(QChar(0x221F)).addUprightHtml("&angrt;");
-    //symbols["smile"]=UprightSymbolUnicode(QChar(0x2323)).addUprightHtml("&smile;");
-    symbols["sphericalangle"]=UprightSymbolUnicode(QChar(0x2222)).addUprightHtml("&angsph;");
-    symbols["star"]=UprightSymbolUnicode(QChar(0x22C6));
-    symbols["tcohm"]=UnicodeSymbol(QChar(0x2126));
-    { auto s=UnicodeSymbol(QChar(0x2014), "&#11840;");
-        symbols["dblhyphen"]=s; symbols["textdblhyphen"]=s; symbols["textdblhyphenchar"]=s; }
-    { auto s=UnicodeSymbol(QChar(0x2014), "&mdash;");
-        symbols["---"]=s; symbols["textemdash"]=s; symbols["emdash"]=s; }
-    { auto s=UnicodeSymbol(QChar(0x2013), "&ndash;");
-        symbols["--"]=s; symbols["textendash"]=s; symbols["endash"]=s; }
-    { auto s=SimpleTextSymbol("-");
-        symbols["texthyphen"]=s; symbols["hyphen"]=s; }
-    symbols["textbar"]=SimpleTextSymbol("|", "&VerticalLine;");
-    { auto s=SimpleTextSymbol(QChar(0xB0), "&deg;");
-        symbols["textdegree"]=s; symbols["degree"] = s; }
-    symbols["textgreater"]=SimpleTextSymbol(">", "&gt;");
-    symbols["textless"]=SimpleTextSymbol("<", "&lt;");
-    symbols["textquestiondown"]=SimpleTextSymbol(QChar(0xBF), "&iquest;");
-    symbols["textexclamdown"]=SimpleTextSymbol(QChar(0xA1), "&iexcl;");
-    { auto s=UnicodeSymbol(QChar(0x231C));
-        symbols["tlcorner"]=s; symbols["ulcorner"]=s; }
-    symbols["trademark"]=UnicodeSymbol(QChar(0x2122)).addHtml("&trade;").addWinSymbol(QChar(0xD4)).addStd("(TM)");
-    symbols["trapezium"]=UnicodeSymbol(QChar(0x23E2)).addHtml("&trpezium;");
-    { auto s=UprightSymbolUnicode(QChar(0x231D));
-        symbols["trcorner"]=s; symbols["urcorner"]=s; }
-    symbols["trprime"]=UnicodeSymbol(QChar(0x2034)).addHtml("&tprime;").addStd("'''");
-    symbols["varcarriagereturn"]=UnicodeSymbol(QChar(0x23CE)).addWinSymbol(QChar(0xBF));
-    symbols["varhexagonlrbonds"]=UnicodeSymbol(QChar(0x232C));
-    symbols["yen"]=SimpleTextSymbol(QChar(0xA5), "&yen;");
-
-
-
-
-
-    /**************************************************************************************
-     * STANDARD MathOperator Strings
-     **************************************************************************************/
-    symbols["Pr"] = NarrowMathOperatorText("Pr");
-    symbols["acos"] = NarrowMathOperatorText("acos");
-    symbols["arccos"] = NarrowMathOperatorText("arccos");
-    symbols["arcsin"] = NarrowMathOperatorText("arcsin");
-    symbols["arctan"] = NarrowMathOperatorText("arctan");
-    symbols["arg"] = NarrowMathOperatorText("arg").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["argmax"] = NarrowMathOperatorText("arg max", "arg&thinsp;max").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["argmin"] = NarrowMathOperatorText("arg min", "arg&thinsp;min").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["asin"] = NarrowMathOperatorText("asin");
-    symbols["atan"] = NarrowMathOperatorText("atan");
-    symbols["cos"] = NarrowMathOperatorText("cos");
-    symbols["cosh"] = NarrowMathOperatorText("cosh");
-    symbols["cot"] = NarrowMathOperatorText("cot");
-    symbols["coth"] = NarrowMathOperatorText("coth");
-    symbols["coth"] = NarrowMathOperatorText("coth");
-    symbols["deg"] = NarrowMathOperatorText("deg");
-    symbols["det"] = NarrowMathOperatorText("det");
-    symbols["dim"] = NarrowMathOperatorText("dim");
-    symbols["exp"] = NarrowMathOperatorText("exp");
-    symbols["gcd"] = NarrowMathOperatorText("gcd");
-    symbols["hom"] = NarrowMathOperatorText("hom");
-    symbols["ker"] = NarrowMathOperatorText("ker");
-    symbols["lb"] = NarrowMathOperatorText("lb");
-    symbols["ld"] = NarrowMathOperatorText("ld");
-    symbols["lim"] = NarrowMathOperatorText("lim").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["liminf"] = NarrowMathOperatorText("lim inf", "lim&thinsp;inf").addGlobalFlags(SubSuperscriptBelowAboveSymbol).addGlobalFlags(SubscriptCorrection);
-    symbols["limsup"] = NarrowMathOperatorText("lim sup", "lim&thinsp;sup").addGlobalFlags(SubSuperscriptBelowAboveSymbol).addGlobalFlags(SubscriptCorrection);
-    symbols["ln"] = NarrowMathOperatorText("ln");
-    symbols["log"] = NarrowMathOperatorText("log");
-    symbols["max"] = NarrowMathOperatorText("max");
-    symbols["median"] = NarrowMathOperatorText("median");
-    symbols["min"] = NarrowMathOperatorText("min");
-    symbols["mod"] = NarrowMathOperatorText("mod");
-    symbols["sec"] = NarrowMathOperatorText("sec");
-    symbols["sgn"] = NarrowMathOperatorText("sgn");
-    symbols["sign"] = NarrowMathOperatorText("sign");
-    symbols["sin"] = NarrowMathOperatorText("sin");
-    symbols["sinh"] = NarrowMathOperatorText("sinh");
-    symbols["tan"] = NarrowMathOperatorText("tan");
-    symbols["tanh"] = NarrowMathOperatorText("tanh");
-
-    /**************************************************************************************
-     * STANDARD MathOperator Symbols
-     **************************************************************************************/
-    { auto s=MathOperatorSymbolUnicode(QChar(0x2217)).addMathOperatorStd("*").addMathOperatorHtml("*");
-        symbols["*"]=s; symbols["ast"]=s; symbols["asterisk"]=s; }
-    symbols["/"]=NarrowMathOperatorSymbolStd("/");
-    symbols["+"]=MathOperatorSymbolUnicode(QChar(0x2B)).addMathOperatorHtml("+").addMathOperatorStd("+");
-    symbols["-"]=MathOperatorSymbolUnicode(QChar(0x2212)).addMathOperatorHtml("-").addMathOperatorStd("-");
-    symbols["<"]=MathOperatorSymbol("<", "&lt;");
-    symbols["="]=MathOperatorSymbol("=");
-    symbols[">"]=MathOperatorSymbol(">", "&gt;");
-    symbols["Downarrow"]=UprightSymbolUnicode(QChar(0x21D3)).addUprightHtml("&DoubleDownArrow;").addUprightWinSymbol(QChar(0xDF));
-    symbols["Leftarrow"]=UprightSymbolUnicode(QChar(0x21D0)).addUprightHtml("&DoubleLeftArrow;").addUprightWinSymbol(QChar(0xDC));
-    symbols["Rightarrow"]=UprightSymbolUnicode(QChar(0x21D2)).addUprightHtml("&Rightarrow;").addUprightWinSymbol(QChar(0xDE));
-    symbols["Uparrow"]=UprightSymbolUnicode(QChar(0x21D1)).addUprightHtml("&DoubleUpArrow;").addUprightWinSymbol(QChar(0xDD));
-    symbols["Updownarrow"]=UprightSymbolUnicode(QChar(0x21D5)).addUprightHtml("&Updownarrow;");
-    symbols["approx"]=MathOperatorSymbolUnicode(QChar(0x2248)).addMathOperatorHtml("&asymp;").addMathOperatorWinSymbol(QChar(0xBB));
-    symbols["bbC"]=UnicodeSymbol(QChar(0x2102));
-    symbols["bbH"]=UnicodeSymbol(QChar(0x210D));
-    symbols["bbN"]=UnicodeSymbol(QChar(0x2115));
-    symbols["bbP"]=UnicodeSymbol(QChar(0x2119));
-    symbols["bbQ"]=UnicodeSymbol(QChar(0x211A));
-    symbols["bbR"]=UnicodeSymbol(QChar(0x211D));
-    symbols["bbZ"]=UnicodeSymbol(QChar(0x2124));
-    symbols["because"]=MathOperatorSymbolUnicode(QChar(0x2235)).addMathOperatorHtml("&because;");
-    symbols["bigcap"]=NarrowMathOperatorSymbolUnicode(QChar(0x22C2)).addMathOperatorHtml("&Intersection;").addMathOperatorWinSymbol(QChar(0xC7), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["bigcup"]=NarrowMathOperatorSymbolUnicode(QChar(0x22C3)).addMathOperatorHtml("&xcup;").addMathOperatorWinSymbol(QChar(0xC8), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    { auto s=NarrowMathOperatorSymbolUnicode(QChar(0x22C0)).addMathOperatorHtml("&Wedge;").addMathOperatorWinSymbol(QChar(0xD9), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-        symbols["bigwedge"]=s; symbols["bighat"]=s; }
-    symbols["bigvee"]=NarrowMathOperatorSymbolUnicode(QChar(0x22C1)).addMathOperatorHtml("&xvee;").addMathOperatorWinSymbol(QChar(0xDA), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["bigotimes"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A02)).addMathOperatorHtml("&bigotimes;").addMathOperatorWinSymbol(QChar(0xC4), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["bigoplus"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A01)).addMathOperatorHtml("&bigoplus;").addMathOperatorWinSymbol(QChar(0xC5), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["bigodot"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A00)).addMathOperatorHtml("&bigodot;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["biguplus"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A04)).addMathOperatorHtml("&biguplus;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["bigsqcup"]=NarrowMathOperatorSymbolUnicode(QChar(0x2A06)).addMathOperatorHtml("&bigsqcup;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    { auto s=MathOperatorSymbolUnicode(QChar(0x22A5)).addMathOperatorHtml("&UpTee;");
-        symbols["bot"]=s; symbols["perp"]=s; }
-    { auto s=MathOperatorSymbolUnicode(QChar(0x2229)).addMathOperatorHtml("&cap;").addMathOperatorWinSymbol(QChar(0xC7));
-        symbols["cap"]=s; symbols["land"]=s; }
-    symbols["cdot"]=MathOperatorSymbol(QChar(0xB7)).addMathOperatorHtml("&middot;").addMathOperatorWinSymbol(QChar(0xD7));
-    symbols["cong"]=MathOperatorSymbolUnicode(QChar(0x2245)).addMathOperatorHtml("&TildeFullEqual;");
-    symbols["coprod"]=NarrowMathOperatorSymbolUnicode(QChar(0x2210)).addMathOperatorHtml("&Coproduct;").addWinSymbol(QChar(0xD5), ItalicOff|BoldOff|FlipSymbolUpDown, 1.8, 0.1).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    { auto s=MathOperatorSymbolUnicode(QChar(0x222A)).addMathOperatorHtml("&cup;").addMathOperatorWinSymbol(QChar(0xC8));
-        symbols["cup"]=s; symbols["lor"]=s; }
-    symbols["ddots"]=UprightSymbolUnicode(QChar(0x22F1)).addMathOperatorHtml("&dtdot;");
-    symbols["div"]=MathOperatorSymbolUnicode(QChar(0x00F7)).addMathOperatorHtml("&div;").addMathOperatorWinSymbol(QChar(0xB8));
-    symbols["downarrow"]=UprightSymbolUnicode(QChar(0x2193)).addUprightHtml("&ShortDownArrow;").addUprightWinSymbol(QChar(0xAF));
-    symbols["downharpoonleft"]=UprightSymbolUnicode(QChar(0x21C3)).addUprightHtml("&LeftDownVector;");
-    symbols["downharpoonright"]=UprightSymbolUnicode(QChar(0x21C2)).addUprightHtml("&RightDownVector;");
-    { auto s=MathOperatorSymbolUnicode(QChar(0x2205)).addMathOperatorHtml("&varnothing;").addMathOperatorWinSymbol(QChar(0xC6)).addStd("0", BoldOff|ItalicOff|DrawSlash);
-        symbols["emptyset"]=s; symbols["varnothing"]=s; }
-    symbols["equiv"]=MathOperatorSymbolUnicode(QChar(0x2261)).addMathOperatorHtml("&equiv;").addMathOperatorWinSymbol(QChar(0xBA));
-    symbols["exists"]=NarrowMathOperatorSymbolUnicode(QChar(0x2203)).addMathOperatorHtml("&exist;").addMathOperatorWinSymbol(QChar(0x24)).addStd("E", ItalicOff|BoldOff|FlipSymbolLeftRight);
-    symbols["forall"]=NarrowMathOperatorSymbolUnicode(QChar(0x2200)).addMathOperatorHtml("&forall;").addMathOperatorWinSymbol(QChar(0x22)).addStd("A", ItalicOff|BoldOff|FlipSymbolUpDown).addGlobalFlags(SubscriptCorrection);
-    { auto s=MathOperatorSymbolUnicode(QChar(0x2265)).addMathOperatorHtml("&GreaterEqual;").addMathOperatorWinSymbol(QChar(0xB3));
-        symbols["geq"]=s; symbols["ge"]=s; }
-    symbols["geqq"]=MathOperatorSymbolUnicode(QChar(0x2267)).addMathOperatorHtml("&GreaterFullEqual;");
-    symbols["gg"]=MathOperatorSymbolUnicode(QChar(0x226B)).addMathOperatorHtml("&NestedGreaterGreater;").addMathOperatorStd(">>");
-    symbols["iddots"]=UprightSymbolUnicode(QChar(0x22F0)).addMathOperatorHtml("&utdot;");
-    { auto s=UprightSymbolUnicode(QChar(0x21D4)).addUprightHtml("&DoubleLeftRightArrow;").addUprightWinSymbol(QChar(0xDB));
-        symbols["iff"]=s; symbols["Leftrightarrow"]=s; }
-    symbols["iiint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222D)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&tint;").addMathOperatorWinSymbol(QString(3, QChar(0xF2)), 1.8, 0.1);
-    symbols["iint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222C)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&Int;").addMathOperatorWinSymbol(QString(2, QChar(0xF2)), 1.8, 0.1);
-    symbols["in"]=MathOperatorSymbolUnicode(QChar(0x2208)).addMathOperatorHtml("&isin;").addMathOperatorWinSymbol(QChar(0xCE));
-    symbols["int"]=NarrowMathOperatorSymbolUnicode(QChar(0x222B)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&int;").addMathOperatorWinSymbol(QChar(0xF2), 1.8, 0.1);
-    symbols["leftarrow"]=UprightSymbolUnicode(QChar(0x2190)).addUprightHtml("&larr;").addUprightWinSymbol(QChar(0xAC));
-    symbols["longleftarrow"]=UprightSymbolUnicode(QChar(0x27F5)).addUprightHtml("&longleftarrow;");
-    symbols["longrightarrow"]=UprightSymbolUnicode(QChar(0x27F6)).addUprightHtml("&longrightarrow;");
-    symbols["longleftrightarrow"]=UprightSymbolUnicode(QChar(0x27F7)).addUprightHtml("&longleftrightarrow;");
-    symbols["Longleftarrow"]=UprightSymbolUnicode(QChar(0x27F8)).addUprightHtml("&DoubleLongLeftArrow;");
-    symbols["Longrightarrow"]=UprightSymbolUnicode(QChar(0x27F9)).addUprightHtml("&DoubleLongRightArrow;");
-    symbols["Longleftrightarrow"]=UprightSymbolUnicode(QChar(0x27FA)).addUprightHtml("&Longleftrightarrow;");
-    symbols["leftharpoondown"]=UprightSymbolUnicode(QChar(0x21BD)).addUprightHtml("&leftharpoondown;");
-    symbols["leftharpoonup"]=UprightSymbolUnicode(QChar(0x21BC)).addUprightHtml("&LeftVector;");
-    symbols["leftrightarrow"]=UprightSymbolUnicode(QChar(0x2194)).addUprightHtml("&harr;").addUprightWinSymbol(QChar(0xAB));
-    symbols["leftrightharpoon"]=UprightSymbolUnicode(QChar(0x21CB)).addUprightHtml("&ReverseEquilibrium;");
-    { auto s=MathOperatorSymbolUnicode(QChar(0x2264)).addMathOperatorHtml("&leq;").addMathOperatorWinSymbol(QChar(0xA3));
-        symbols["leq"]=s; symbols["le"]=s; }
-    symbols["leqq"]=MathOperatorSymbolUnicode(QChar(0x2266)).addMathOperatorHtml("&LessFullEqual;");
-    symbols["ll"]=MathOperatorSymbolUnicode(QChar(0x226A)).addMathOperatorHtml("&NestedLessLess;").addMathOperatorStd("<<");
-    symbols["lnot"]=MathOperatorSymbolUnicode(QChar(0xAC)).addMathOperatorWinSymbol(QChar(0xD8)).addMathOperatorHtml("&not;");
-    symbols["mapimage"]=MathOperatorSymbolUnicode(QChar(0x22B7)).addMathOperatorHtml("&imof;");
-    symbols["maporiginal"]=MathOperatorSymbolUnicode(QChar(0x22B6)).addMathOperatorHtml("&origof;");
-    symbols["mapsto"]=MathOperatorSymbolUnicode(QChar(0x21A6)).addMathOperatorHtml("&RightTeeArrow;");
-    symbols["mid"]=MathOperatorSymbolUnicode(QChar(0x2223)).addMathOperatorHtml("&VerticalBar;").addMathOperatorWinSymbol(QChar(0xBD)).addMathOperatorStd("|");
-    symbols["mp"]=MathOperatorSymbolUnicode(QChar(0x2213)).addMathOperatorHtml("&mp;").addWinSymbol(QChar(0xB1),ItalicOff|BoldOff|FlipSymbolUpDown).addStd(QChar(0xB1),ItalicOff|BoldOff|FlipSymbolUpDown);
-    symbols["multimap"]=MathOperatorSymbolUnicode(QChar(0x22B8)).addMathOperatorHtml("&mumap;");
-    symbols["nabla"]=NarrowMathOperatorSymbolUnicode(QChar(0x2207)).addMathOperatorHtml("&nabla;").addMathOperatorWinSymbol(QChar(0xD1)).addGlobalFlags(IntLikeSymbolCorrection);
-    symbols["ne"]=NarrowMathOperatorSymbolUnicode(QChar(0x2260)).addMathOperatorHtml("&ne;").addMathOperatorWinSymbol(QChar(0xB9));
-    symbols["nearrow"]=UprightSymbolUnicode(QChar(0x2197)).addUprightHtml("&UpperRightArrow;");
-    { auto s=MathOperatorSymbolUnicode(QChar(0x00AC)).addMathOperatorHtml("&not;").addMathOperatorWinSymbol(QChar(0xD8));
-        symbols["neg"]=s; symbols["lnot"]=s; }
-    symbols["neq"]=MathOperatorSymbolUnicode(QChar(0x2260)).addMathOperatorHtml("&ne;").addMathOperatorWinSymbol(QChar(0xB9)).addStd("=", ItalicOff|BoldOff|DrawSlash);
-    symbols["nexists"]=NarrowMathOperatorSymbolUnicode(QChar(0x2204)).addMathOperatorHtml("&NotExists;").addStd("E", ItalicOff|BoldOff|FlipSymbolLeftRight|DrawSlash).addMathOperatorWinSymbol(QChar(0x24), ItalicOff|BoldOff|DrawSlash);
-    symbols["ni"]=NarrowMathOperatorSymbolUnicode(QChar(0x220B)).addMathOperatorHtml("&ReverseElement;").addMathOperatorWinSymbol(QChar(0xCE), ItalicOff|BoldOff|FlipSymbolLeftRight);
-    symbols["nmid"]=NarrowMathOperatorSymbolUnicode(QChar(0x2224)).addMathOperatorHtml("&NotVerticalBar;");
-    symbols["notin"]=NarrowMathOperatorSymbolUnicode(QChar(0x2209)).addMathOperatorHtml("&notin;").addMathOperatorWinSymbol(QChar(0xCF));
-    symbols["notni"]=NarrowMathOperatorSymbolUnicode(QChar(0x220C)).addMathOperatorHtml("&NotReverseElement;");
-    symbols["nparallel"]=MathOperatorSymbolUnicode(QChar(0x2226)).addMathOperatorHtml("&NotDoubleVerticalBar;");
-    symbols["nwarrow"]=UprightSymbolUnicode(QChar(0x2196)).addUprightHtml("&UpperLeftArrow;");
-    symbols["odot"]=MathOperatorSymbolUnicode(QChar(0x2299)).addMathOperatorHtml("&odot;");
-    symbols["oiiint"]=NarrowMathOperatorSymbolUnicode(QChar(0x2230)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&Cconint;");
-    symbols["oiint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222F)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&DoubleContourIntegral;");
-    symbols["oint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222E)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&ContourIntegral;");
-    symbols["ominus"]=MathOperatorSymbolUnicode(QChar(0x2296)).addMathOperatorHtml("&ominus;");
-    symbols["oplus"]=MathOperatorSymbolUnicode(QChar(0x2295)).addMathOperatorHtml("&CirclePlus;").addMathOperatorWinSymbol(QChar(0xC5));
-    symbols["oslash"]=MathOperatorSymbolUnicode(QChar(0x2298)).addMathOperatorHtml("&osol;");
-    symbols["otimes"]=MathOperatorSymbolUnicode(QChar(0x2297)).addMathOperatorHtml("&CircleTimes;").addMathOperatorWinSymbol(QChar(0xC4));
-    symbols["parallel"]=NarrowMathOperatorSymbolUnicode(QChar(0x2225)).addMathOperatorHtml("&shortparallel;").addMathOperatorStd("||");
-    symbols["pm"] = MathOperatorSymbol(QChar(0xB1), "&plusmn;").addMathOperatorWinSymbol(QChar(0xB1));
-    symbols["prec"]=MathOperatorSymbolUnicode(QChar(0x227A)).addMathOperatorHtml("&prec;");
-    symbols["prod"]=NarrowMathOperatorSymbolUnicode(QChar(0x220F)).addMathOperatorWinSymbol(QChar(0xD5), 1.8, 0.1).addMathOperatorHtml("&prod;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["propto"]=MathOperatorSymbolUnicode(QChar(0x221D)).addMathOperatorWinSymbol(QChar(0xB5)).addMathOperatorHtml("&Proportional;");
-    symbols["rightharpoondown"]=UprightSymbolUnicode(QChar(0x21C1)).addUprightHtml("&rightharpoondown;");
-    symbols["rightharpoonup"]=UprightSymbolUnicode(QChar(0x21C0)).addUprightHtml("&RightVector;");
-    symbols["rightleftharpoon"]=UprightSymbolUnicode(QChar(0x21CC)).addUprightHtml("&Equilibrium;");
-    symbols["searrow"]=UprightSymbolUnicode(QChar(0x2198)).addUprightHtml("&LowerRightArrow;");
-    symbols["setminus"]=MathOperatorSymbolUnicode(QChar(0x2216)).addMathOperatorHtml("&smallsetminus;");
-    { auto s=MathOperatorSymbolUnicode(QChar(0x223C)).addMathOperatorHtml("&tilde;").addMathOperatorStd("~");
-        symbols["~"]=s; symbols["sim"]=s; }
-    symbols["simeq"]=MathOperatorSymbolUnicode(QChar(0x2243)).addMathOperatorHtml("&TildeEqual;");
-    symbols["sqcap"]=MathOperatorSymbolUnicode(QChar(0x2293)).addMathOperatorHtml("&SquareIntersection;");
-    symbols["sqcup"]=MathOperatorSymbolUnicode(QChar(0x2294)).addMathOperatorHtml("&SquareUnion;");
-    symbols["square"]=MathOperatorSymbolUnicode(QChar(0x25A1));
-    symbols["subset"]=MathOperatorSymbolUnicode(QChar(0x2282)).addMathOperatorHtml("&sub;").addMathOperatorWinSymbol(QChar(0xCC));
-    symbols["subseteq"]=MathOperatorSymbolUnicode(QChar(0x2286)).addMathOperatorHtml("&SubsetEqual;").addMathOperatorWinSymbol(QChar(0xCD));
-    symbols["subsetnot"]=MathOperatorSymbolUnicode(QChar(0x2284)).addMathOperatorHtml("&nsub;").addMathOperatorWinSymbol(QChar(0xCB));
-    symbols["succ"]=MathOperatorSymbolUnicode(QChar(0x227B)).addMathOperatorHtml("&succ;");
-    symbols["sum"]=NarrowMathOperatorSymbolUnicode(QChar(0x2211)).addMathOperatorWinSymbol(QChar(0xE5), 1.8, 0.1).addMathOperatorHtml("&sum;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["supset"]=MathOperatorSymbolUnicode(QChar(0x2283)).addMathOperatorHtml("&sup;").addMathOperatorWinSymbol(QChar(0xC9));
-    symbols["supseteq"]=MathOperatorSymbolUnicode(QChar(0x2287)).addMathOperatorHtml("&SupersetEqual;").addMathOperatorWinSymbol(QChar(0xCA));
-    symbols["supsetnot"]=MathOperatorSymbolUnicode(QChar(0x2285)).addMathOperatorHtml("&nsup;");
-    symbols["swarrow"]=UprightSymbolUnicode(QChar(0x2199)).addUprightHtml("&LowerLeftArrow;");
-    symbols["therefore"]=MathOperatorSymbolUnicode(QChar(0x2234)).addMathOperatorHtml("&therefore;").addMathOperatorWinSymbol(QChar(0x5C));
-    symbols["times"] = MathOperatorSymbol(QChar(0xD7), "&times;").addMathOperatorWinSymbol(QChar(0xB4));
-    { auto s=UprightSymbolUnicode(QChar(0x2192)).addUprightHtml("&rarr;").addUprightWinSymbol(QChar(0xAE));
-      symbols["to"]=s; symbols["rightarrow"]=s; }
-    symbols["top"]=MathOperatorSymbolUnicode(QChar(0x22A4)).addMathOperatorHtml("&top;").addMathOperatorWinSymbol(QChar(0x5E)).addUprightStd("T");
-    symbols["triangle"]=NarrowMathOperatorSymbolUnicode(QChar(0x2206));
-    symbols["uparrow"]=UprightSymbolUnicode(QChar(0x2191)).addUprightHtml("&ShortUpArrow;").addUprightWinSymbol(QChar(0xAD));
-    symbols["updownarrow"]=UprightSymbolUnicode(QChar(0x2195)).addUprightHtml("&updownarrow;");
-    symbols["upharpoonleft"]=UprightSymbolUnicode(QChar(0x21BF)).addUprightHtml("&LeftUpVector;");
-    symbols["upharpoonright"]=UprightSymbolUnicode(QChar(0x21BE)).addUprightHtml("&RightUpVector;");
-    symbols["vartriangleleft"]=NarrowMathOperatorSymbolUnicode(QChar(0x22B2)).addMathOperatorHtml("&LeftTriangle;");
-    symbols["vdots"]=UprightSymbolUnicode(QChar(0x22EE)).addMathOperatorHtml("&vellip;");
-    symbols["vee"]=MathOperatorSymbolUnicode(QChar(0x2228)).addMathOperatorHtml("&vee;").addMathOperatorWinSymbol(QChar(0xDA));
-    symbols["vdash"]=MathOperatorSymbolUnicode(QChar(0x22A2)).addMathOperatorHtml("&vdash;");
-    symbols["dashv"]=MathOperatorSymbolUnicode(QChar(0x22A3)).addMathOperatorHtml("&dashv;");
-    symbols["vDash"]=MathOperatorSymbolUnicode(QChar(0x22A8)).addMathOperatorHtml("&DoubleRightTee;");
-    symbols["nvdash"]=MathOperatorSymbolUnicode(QChar(0x22AC)).addMathOperatorHtml("&nvdash;");
-    symbols["Vdash"]=MathOperatorSymbolUnicode(QChar(0x22A9)).addMathOperatorHtml("&Vdash;");
-    symbols["models"]=MathOperatorSymbolUnicode(QChar(0x22A7)).addMathOperatorHtml("&models;");
-    symbols["wedge"]=MathOperatorSymbolUnicode(QChar(0x2227)).addMathOperatorHtml("&wedge;").addMathOperatorWinSymbol(QChar(0xD9));
-
-
-
-    /**************************************************************************************
-     * GREEK letters
-     **************************************************************************************/
-    addGreekLetterVariants_WinSymbol_Unicode_Html("alpha", "a", QChar(0x3B1), "&alpha;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("beta", "b", QChar(0x3B2), "&beta;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("gamma", "g", QChar(0x3B3), "&gamma;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("delta", "d", QChar(0x3B4), "&delta;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("epsilon", "e", QChar(0x3F5), "&varepsilon;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("varepsilon", "e", QChar(0x3B5), "&epsi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("zeta", "z", QChar(0x3B6),"&zeta;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("eta", "h", QChar(0x3B7),"&eta;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("theta", "q", QChar(0x3B8),"&theta;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("vartheta", "J", QChar(0x3D1),"&thetasym;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("iota", "i", QChar(0x3B9),"&iota;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("kappa", "k", QChar(0x3BA),"&kappa;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("lambda", "l", QChar(0x3BB),"&lambda;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("mu", "m", QChar(0x3BC),"&mu;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("nu", "n", QChar(0x3BD),"&nu;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("xi", "x", QChar(0x3BE),"&xi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("pi", "p", QChar(0x3C0),"&pi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("varpi", "v", QChar(0x3D6),"&piv;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("rho", "r", QChar(0x3C1),"&rho;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("varrho", "r", QChar(0x3F1),"&varrho;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("sigma", "s", QChar(0x3C3),"&sigma;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("varsigma", "V", QChar(0x3C2),"&varsigma;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("tau", "t", QChar(0x3C4),"&tau;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("upsilon", "u", QChar(0x3C5),"&upsilon;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("phi", "f", QChar(0x3C5),"&straightphi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("varphi", "j", QChar(0x3D6),"&phi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("chi", "c", QChar(0x3C7),"&chi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("psi", "y", QChar(0x3C8),"&psi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("omega", "w", QChar(0x3C9),"&omega;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Gamma", "G", QChar(0x3A3),"&Gamma;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Delta", "D", QChar(0x394),"&Delta;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Theta", "Q", QChar(0x398),"&Theta;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Lambda", "L", QChar(0x39B),"&Lambda;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Omega", "W", QChar(0x3A9),"&Omega;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Xi", "X", QChar(0x39E),"&Xi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Pi", "P", QChar(0x3A0),"&Pi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Sigma", "S", QChar(0x3A3),"&Sigma;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Upsilon", "U", QChar(0x3C6),"&Upsilon;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Phi", "F", QChar(0x3A6),"&Phi;");
-    addGreekLetterVariants_WinSymbol_Unicode_Html("Psi", "Y", QChar(0x3A8),"&Psi;");
-
-
-    /**************************************************************************************
-     * SYMBOLS from special fonts
-     **************************************************************************************/
-#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
-        QFontDatabase fdb;
-        const auto fonts=fdb.families();
-#else
-        const auto fonts=QFontDatabase::families();
-#endif
-    if (fonts.contains("Wingdings")) {
-        { auto s=SymbolFullProps("Wingdings", QChar(0x46));
-        symbols["lefthand"]=s; symbols["HandRight"]=s;}
-        { auto s=SymbolFullProps("Wingdings", QChar(0x45));
-        symbols["righthand"]=s; symbols["HandLeft"]=s;}
-    }
-
-}
 
 
 JKQTMathTextSymbolNode::SymbolFullProps::SymbolFullProps():
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.h b/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.h
index 7dd5dc4254..c932fc2f5c 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.h
@@ -274,7 +274,7 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSymbolNode: public JKQTMathTextNode {
         /** \brief constructs a SymbolProps for a greek letter with the format from outside with the symbol in unicode-encoding \a letterUnicode and in WinSymbol-encoding letterWinWsymbol */
         static SymbolFullProps AsOutsiudeGreekLetter_WinSymbol_Unicode_Html(const QString& letterWinSymbol, const QString& letterUnicode, const QString& html);
         /** \brief insert GreekLetter_WinSymbol_Unicode_Html() as \a baseInstructionName and UprightGreekLetter_WinSymbol_Unicode_Html and "up"+\a letterWinSymbol into symbols */
-        static void addGreekLetterVariants_WinSymbol_Unicode_Html(const QString& baseInstructionName, const QString& letterWinSymbol, const QString& letterUnicode, const QString& html);
+        static void addGreekLetterVariants_WinSymbol_Unicode_Html(QHash<QString, JKQTMathTextSymbolNode::SymbolFullProps>& symbols,const QString& baseInstructionName, const QString& letterWinSymbol, const QString& letterUnicode, const QString& html);
         /** \brief constructs a SymbolProps for a symbol with encoding in Standard-fonts a */
         static SymbolFullProps StdSymbol(const QString& symbol, const QString& html);
         /** \brief constructs a SymbolProps for a symbol with encoding in UnicodeFull-fonts a */
@@ -306,10 +306,7 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSymbolNode: public JKQTMathTextNode {
 
 
         /** \brief symbols that can be generated in any standard-font */
-        static QHash<QString, SymbolFullProps> symbols;
-
-        /** \brief fill the symbol tables standardTextSymbols, winSymbolSymbol, ... with contents */
-        static void fillSymbolTables();
+        static const QHash<QString, SymbolFullProps>& symbols();
 
         /** \brief retrieve the properties to render the given symbol \a symName in the current environment \a currentEv */
         SymbolFullProps getSymbolProp(const QString& symName, const JKQTMathTextEnvironment& currentEv) const;
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.cpp
index ba2ed34d25..6a8c3c82bd 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.cpp
@@ -73,37 +73,39 @@ bool JKQTMathTextTextBaseNode::toHtml(QString &html, JKQTMathTextEnvironment cur
 
 
 
-QHash<QChar, uint32_t> JKQTMathTextTextNode::blackboardUnicodeTable=QHash<QChar, uint32_t>();
+const QHash<QChar, uint32_t>& JKQTMathTextTextNode::blackboardUnicodeTable(){
+    static QHash<QChar, uint32_t> table=[]() {
+        QHash<QChar, uint32_t> blackboardUnicodeTable;
 
-void JKQTMathTextTextNode::fillStaticTables() {
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (blackboardUnicodeTable.size()>0) return;
+        const QString ALPHA="ABDEFGIJKLMOSTUVWXYZ";
+        for (const QChar ch: ALPHA) {
+            blackboardUnicodeTable[ch]=0x1D538+(ch.unicode()-QChar('A').unicode());
+        }
+        const QString alpha="abcdefghijklmnopqrstuvwxyz";
+        for (const QChar ch: alpha) {
+            blackboardUnicodeTable[ch]=0x1D552+(ch.unicode()-QChar('a').unicode());
+        }
+        const QString nums="0123456789";
+        for (const QChar ch: nums) {
+            blackboardUnicodeTable[ch]=0x1D7D8+(ch.unicode()-QChar('0').unicode());
+        }
 
+        blackboardUnicodeTable['C']=0x2102;
+        blackboardUnicodeTable['H']=0x210D;
+        blackboardUnicodeTable['N']=0x2115;
+        blackboardUnicodeTable['P']=0x2119;
+        blackboardUnicodeTable['Q']=0x211A;
+        blackboardUnicodeTable['R']=0x211D;
+        blackboardUnicodeTable['Z']=0x2124;
 
-    for (const QChar ch: QString("ABDEFGIJKLMOSTUVWXYZ")) {
-        blackboardUnicodeTable[ch]=0x1D538+(ch.unicode()-QChar('A').unicode());
-    }
-    for (const QChar ch: QString("abcdefghijklmnopqrstuvwxyz")) {
-        blackboardUnicodeTable[ch]=0x1D552+(ch.unicode()-QChar('a').unicode());
-    }
-    for (const QChar ch: QString("0123456789")) {
-        blackboardUnicodeTable[ch]=0x1D7D8+(ch.unicode()-QChar('0').unicode());
-    }
-
-    blackboardUnicodeTable['C']=0x2102;
-    blackboardUnicodeTable['H']=0x210D;
-    blackboardUnicodeTable['N']=0x2115;
-    blackboardUnicodeTable['P']=0x2119;
-    blackboardUnicodeTable['Q']=0x211A;
-    blackboardUnicodeTable['R']=0x211D;
-    blackboardUnicodeTable['Z']=0x2124;
+        return blackboardUnicodeTable;
+    }();
+    return table;
 }
 
 JKQTMathTextTextNode::JKQTMathTextTextNode(JKQTMathText* _parent, const QString& textIn, bool addWhitespace, bool stripInnerWhitepace):
     JKQTMathTextTextBaseNode(_parent, "")
 {
-    fillStaticTables();
     QString textTransformed=textIn;
 
     if (stripInnerWhitepace) {
@@ -240,11 +242,11 @@ void JKQTMathTextTextNode::splitTextForLayout(QPainter &painter, JKQTMathTextEnv
             } else if (bbMode==MTBBDMsimulate) {
                 CFontMode=FMasDefinedOutline;
             } else if (bbMode==MTBBDMunicodeCharactersOrSimulate || bbMode==MTBBDMunicodeCharactersOrFontDirectly) {
-                if (blackboardUnicodeTable.contains(c) && fmRoman.inFontUcs4(blackboardUnicodeTable[c])) {
-                    cs=jkqtp_UnicodeToUTF8Q(blackboardUnicodeTable[c]);
+                if (blackboardUnicodeTable().contains(c) && fmRoman.inFontUcs4(blackboardUnicodeTable().operator[](c))) {
+                    cs=jkqtp_UnicodeToUTF8Q(blackboardUnicodeTable().operator[](c));
                     CFontMode=FMroman;
-                } else if (blackboardUnicodeTable.contains(c) && fmFallbackSym.inFontUcs4(blackboardUnicodeTable[c])) {
-                    cs=jkqtp_UnicodeToUTF8Q(blackboardUnicodeTable[c]);
+                } else if (blackboardUnicodeTable().contains(c) && fmFallbackSym.inFontUcs4(blackboardUnicodeTable().operator[](c))) {
+                    cs=jkqtp_UnicodeToUTF8Q(blackboardUnicodeTable().operator[](c));
                     CFontMode=FMfallbackSymbol;
                 } else {
                     if (bbMode==MTBBDMunicodeCharactersOrSimulate) {
@@ -291,10 +293,10 @@ double JKQTMathTextTextNode::draw(QPainter& painter, double x, double y, JKQTMat
     const QFont fUpright=JKQTMathTextGetNonItalic(f);
     const QFont fFallbackSym=currentEv.exchangedFontFor(MTEFallbackSymbols).getFont(parentMathText);
     const QFont fRoman=currentEv.exchangedFontForRoman().getFont(parentMathText);
-    const QFontMetricsF fm(f, painter.device());
-    const QFontMetricsF fmUpright(fUpright, painter.device());
-    const QFontMetricsF fmFallbackSym(fFallbackSym, painter.device());
-    const QFontMetricsF fmRoman(fRoman, painter.device());
+    //const QFontMetricsF fm(f, painter.device());
+    //const QFontMetricsF fmUpright(fUpright, painter.device());
+    //const QFontMetricsF fmFallbackSym(fFallbackSym, painter.device());
+    //const QFontMetricsF fmRoman(fRoman, painter.device());
 
     painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
     painter.setFont(f);
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.h b/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.h
index c5903ba5a6..a4e56bab2e 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.h
@@ -110,9 +110,7 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextTextNode: public JKQTMathTextTextBaseN
          */
         void splitTextForLayout(QPainter &painter, JKQTMathTextEnvironment currentEv, const QString& txt, QStringList& textpart, QList<FontMode>& fontMode) const;
         /** \brief translation table for blackboard-font characters from "normal" Latin-1 encoding to unicode-encoding of blackboards */
-        static QHash<QChar, uint32_t> blackboardUnicodeTable;
-        /** \brief fill static data */
-        static void fillStaticTables();
+        static const QHash<QChar, uint32_t>& blackboardUnicodeTable();
         /** \copydoc JKQTMathTextTextBaseNode::textTransform() */
         virtual QString textTransform(const QString& text, const JKQTMathTextEnvironment& currentEv) const override;
 };
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextwhitespacenode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtextwhitespacenode.cpp
index b7a5cbd55b..905fa7bb44 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextwhitespacenode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextwhitespacenode.cpp
@@ -51,15 +51,13 @@ JKQTMathTextWhitespaceNode::JKQTMathTextWhitespaceNode(JKQTMathText *_parent):
 JKQTMathTextWhitespaceNode::JKQTMathTextWhitespaceNode(const QString &_type, JKQTMathText *parent):
     JKQTMathTextWhitespaceNode(parent)
 {
-    fillSupportedInstructions();
-    whitespace=supportedInstructions[_type];
+    whitespace=supportedInstructions()[_type];
 }
 
 JKQTMathTextWhitespaceNode::JKQTMathTextWhitespaceNode(const QString &_type, size_t count, JKQTMathText *parent):
     JKQTMathTextWhitespaceNode(parent)
 {
-    fillSupportedInstructions();
-    whitespace=supportedInstructions[_type];
+    whitespace=supportedInstructions()[_type];
     whitespace.count=whitespace.count*count;
 }
 
@@ -67,7 +65,6 @@ JKQTMathTextWhitespaceNode::JKQTMathTextWhitespaceNode(Types type, size_t count,
     JKQTMathTextNode(parent),
     whitespace(type, count)
 {
-    fillSupportedInstructions();
 }
 
 JKQTMathTextWhitespaceNode::~JKQTMathTextWhitespaceNode() {
@@ -134,31 +131,30 @@ JKQTMathTextNodeSize JKQTMathTextWhitespaceNode::getSizeInternal(QPainter &paint
     return s;
 }
 
-QHash<QString, JKQTMathTextWhitespaceNode::WhitespaceProps> JKQTMathTextWhitespaceNode::supportedInstructions;
-
-void JKQTMathTextWhitespaceNode::fillSupportedInstructions()
-{
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (supportedInstructions.size()==0) {
-        supportedInstructions[" "]=WhitespaceProps(WSTthicker, 1);
-        supportedInstructions["nbsp"]=WhitespaceProps(WSTNonbreaking, 1);
-        supportedInstructions["enspace"]=WhitespaceProps(WST1en, 1);
-        supportedInstructions["enskip"]=WhitespaceProps(WST1en, 1);
-        supportedInstructions["quad"]=WhitespaceProps(WSTQuad, 1);
-        supportedInstructions["emspace"]=WhitespaceProps(WSTQuad, 1);
-        supportedInstructions["qquad"]=WhitespaceProps(WSTQuad, 2);
-        supportedInstructions[","]=WhitespaceProps(WSTthin, 1);
-        supportedInstructions["thinspace"]=WhitespaceProps(WSTthin, 1);
-        supportedInstructions[":"]=WhitespaceProps(WSTmedium, 1);
-        supportedInstructions["medspace"]=WhitespaceProps(WSTmedium, 1);
-        supportedInstructions[";"]=WhitespaceProps(WSTthick, 1);
-        supportedInstructions["thickspace"]=WhitespaceProps(WSTthick, 1);
-        supportedInstructions["!"]=WhitespaceProps(WSTnegthin, 1);
-        supportedInstructions["negthinspace"]=WhitespaceProps(WSTnegthin, 1);
-        supportedInstructions["negmedspace"]=WhitespaceProps(WSTnegmedium, 1);
-        supportedInstructions["negthickspace"]=WhitespaceProps(WSTnegthick, 1);
-    }
+const QHash<QString, JKQTMathTextWhitespaceNode::WhitespaceProps>& JKQTMathTextWhitespaceNode::supportedInstructions() {
+    static QHash<QString, JKQTMathTextWhitespaceNode::WhitespaceProps> table=[]()
+        {
+            QHash<QString, JKQTMathTextWhitespaceNode::WhitespaceProps> supportedInstructions;
+            supportedInstructions[" "]=WhitespaceProps(WSTthicker, 1);
+            supportedInstructions["nbsp"]=WhitespaceProps(WSTNonbreaking, 1);
+            supportedInstructions["enspace"]=WhitespaceProps(WST1en, 1);
+            supportedInstructions["enskip"]=WhitespaceProps(WST1en, 1);
+            supportedInstructions["quad"]=WhitespaceProps(WSTQuad, 1);
+            supportedInstructions["emspace"]=WhitespaceProps(WSTQuad, 1);
+            supportedInstructions["qquad"]=WhitespaceProps(WSTQuad, 2);
+            supportedInstructions[","]=WhitespaceProps(WSTthin, 1);
+            supportedInstructions["thinspace"]=WhitespaceProps(WSTthin, 1);
+            supportedInstructions[":"]=WhitespaceProps(WSTmedium, 1);
+            supportedInstructions["medspace"]=WhitespaceProps(WSTmedium, 1);
+            supportedInstructions[";"]=WhitespaceProps(WSTthick, 1);
+            supportedInstructions["thickspace"]=WhitespaceProps(WSTthick, 1);
+            supportedInstructions["!"]=WhitespaceProps(WSTnegthin, 1);
+            supportedInstructions["negthinspace"]=WhitespaceProps(WSTnegthin, 1);
+            supportedInstructions["negmedspace"]=WhitespaceProps(WSTnegmedium, 1);
+            supportedInstructions["negthickspace"]=WhitespaceProps(WSTnegthick, 1);
+            return supportedInstructions;
+        }();
+    return table;
 
 }
 
@@ -212,8 +208,7 @@ double JKQTMathTextWhitespaceNode::Type2PixelWidth(Types type, JKQTMathTextEnvir
 
 bool JKQTMathTextWhitespaceNode::supportsInstructionName(const QString &instruction)
 {
-    fillSupportedInstructions();
-    return supportedInstructions.contains(instruction);
+    return supportedInstructions().contains(instruction);
 }
 
 
@@ -370,13 +365,11 @@ QString JKQTMathTextPhantomNode::Mode2Instruction(Mode mode)
 JKQTMathTextPhantomNode::JKQTMathTextPhantomNode(JKQTMathText *parent, const QString &mode, JKQTMathTextNode *child):
     JKQTMathTextInstruction1Node(parent, mode, child)
 {
-    fillInstructions();
 }
 
 JKQTMathTextPhantomNode::JKQTMathTextPhantomNode(JKQTMathText* _parent, Mode mode, JKQTMathTextNode* child):
     JKQTMathTextInstruction1Node(_parent, Mode2Instruction(mode), child)
 {
-    fillInstructions();
 }
 
 JKQTMathTextPhantomNode::~JKQTMathTextPhantomNode() {
@@ -389,10 +382,9 @@ QString JKQTMathTextPhantomNode::getTypeName() const
 }
 
 JKQTMathTextNodeSize JKQTMathTextPhantomNode::getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv) const {
-    fillInstructions();
     JKQTMathTextNodeSize s=getChild()->getSize(painter, currentEv);
 
-    switch(instructions[getInstructionName()]) {
+    switch(instructions()[getInstructionName()]) {
         case FMwidth:
             s.overallHeight=0;
             s.baselineHeight=0;
@@ -415,25 +407,23 @@ double JKQTMathTextPhantomNode::draw(QPainter& painter, double x, double y, JKQT
 
 bool JKQTMathTextPhantomNode::toHtml(QString &html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const {
     JKQTMathTextEnvironment ev=currentEv;
-    fillInstructions();
     return "&nbsp;";
 }
 
 bool JKQTMathTextPhantomNode::supportsInstructionName(const QString &instructionName)
 {
-    fillInstructions();
-    return instructions.contains(instructionName);
+    return instructions().contains(instructionName);
 }
 
-QHash<QString, JKQTMathTextPhantomNode::Mode> JKQTMathTextPhantomNode::instructions;
-
-void JKQTMathTextPhantomNode::fillInstructions()
-{
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    if (instructions.size()>0) return;
-    instructions["phantom"] = FMwidthAndHeight;
-    instructions["hphantom"] = FMwidth;
-    instructions["vphantom"] = FMheight;
+const QHash<QString, JKQTMathTextPhantomNode::Mode>& JKQTMathTextPhantomNode::instructions() {
+    static QHash<QString, JKQTMathTextPhantomNode::Mode> table=[]()
+        {
+            QHash<QString, JKQTMathTextPhantomNode::Mode> instructions;
+            instructions["phantom"] = FMwidthAndHeight;
+            instructions["hphantom"] = FMwidth;
+            instructions["vphantom"] = FMheight;
+            return instructions;
+        }();
+    return table;
 }
 
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextwhitespacenode.h b/lib/jkqtmathtext/nodes/jkqtmathtextwhitespacenode.h
index 83e6402a75..a5c711ee25 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextwhitespacenode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextwhitespacenode.h
@@ -100,10 +100,11 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextWhitespaceNode: public JKQTMathTextNod
         WhitespaceProps whitespace;
         /** \brief converts Types \a type into its HTML representation */
         static QString Type2HTML(Types type);
-        /** \brief translation table between latex instruction and WhitespaceProps */
-        static QHash<QString, WhitespaceProps> supportedInstructions;
-        /** \brief initializes supportedInstructions */
-        static void fillSupportedInstructions();
+        /** \brief translation table between latex instruction and WhitespaceProps
+         *
+         *  \note This is a customization point for additional whitespace instructions!
+         */
+        static const QHash<QString, WhitespaceProps>& supportedInstructions();
 };
 
 
@@ -187,13 +188,11 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextPhantomNode: public JKQTMathTextInstru
     protected:
         /** \copydoc JKQTMathTextNode::getSizeInternal() */
         virtual JKQTMathTextNodeSize getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv) const override;
-        /** \brief fills instructions
+        /** \brief defines all implemented instructions in this node
          *
          *  \note this is the customization point for new instructions!
-         */
-        static void fillInstructions();
-        /** \brief defines all implemented instructions in this node */
-        static QHash<QString, Mode> instructions;
+          */
+        static const QHash<QString, Mode>& instructions();
 };
 #endif // JKQTMATHTEXTWHITESPACENODE_H
 
diff --git a/lib/jkqtplotter/jkqtpbaseplotter.cpp b/lib/jkqtplotter/jkqtpbaseplotter.cpp
index 36372850bc..cd3f71ed85 100644
--- a/lib/jkqtplotter/jkqtpbaseplotter.cpp
+++ b/lib/jkqtplotter/jkqtpbaseplotter.cpp
@@ -53,6 +53,7 @@
 #include "jkqtmathtext/jkqtmathtext.h"
 #include "jkqtplotter/jkqtpkey.h"
 #include <algorithm>
+#include <mutex>
 
 QString JKQTBasePlotter::globalUserSettigsFilename="";
 QString JKQTBasePlotter::globalUserSettigsPrefix="";
@@ -64,10 +65,11 @@ JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>> JKQTBasePlotter::jkqtpSaveDataAd
 
 void initJKQTBasePlotterResources()
 {
-    static std::mutex sMutex;
-    std::lock_guard<std::mutex> lock(sMutex);
-    Q_INIT_RESOURCE(jkqtpbaseplotter);
-    initJKQTMathTextResources();
+    static std::once_flag flag;
+    std::call_once(flag, []() {
+        Q_INIT_RESOURCE(jkqtpbaseplotter);
+        initJKQTMathTextResources();
+    });
 }
 
 
@@ -80,20 +82,20 @@ void JKQTBasePlotter::setDefaultJKQTBasePrinterUserSettings(QString userSettigsF
 
 void JKQTBasePlotter::registerPaintDeviceAdapter(JKQTPPaintDeviceAdapter *adapter)
 {
-    JKQTPSynchronized<QList<JKQTPPaintDeviceAdapter*>>::Locker lock(jkqtpPaintDeviceAdapters);
+    JKQTPSynchronized<QList<JKQTPPaintDeviceAdapter*>>::WriteLocker lock(jkqtpPaintDeviceAdapters);
     jkqtpPaintDeviceAdapters.get().append(adapter);
 }
 
 void JKQTBasePlotter::deregisterPaintDeviceAdapter(JKQTPPaintDeviceAdapter *adapter)
 {
-    JKQTPSynchronized<QList<JKQTPPaintDeviceAdapter*>>::Locker lock(jkqtpPaintDeviceAdapters);
+    JKQTPSynchronized<QList<JKQTPPaintDeviceAdapter*>>::WriteLocker lock(jkqtpPaintDeviceAdapters);
     if (jkqtpPaintDeviceAdapters.get().contains(adapter)) jkqtpPaintDeviceAdapters.get().removeAll(adapter);
 }
 
 bool JKQTBasePlotter::registerSaveDataAdapter(JKQTPSaveDataAdapter *adapter)
 {
     if (adapter){
-        JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::Locker lock(jkqtpSaveDataAdapters);
+        JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::WriteLocker lock(jkqtpSaveDataAdapters);
         QString format=adapter->getFilter();
         for (int i=0; i<jkqtpSaveDataAdapters.get().size(); i++) {
             if (jkqtpSaveDataAdapters.get()[i] && jkqtpSaveDataAdapters.get()[i]->getFilter()==format) {
@@ -108,7 +110,7 @@ bool JKQTBasePlotter::registerSaveDataAdapter(JKQTPSaveDataAdapter *adapter)
 
 bool JKQTBasePlotter::deregisterSaveDataAdapter(JKQTPSaveDataAdapter *adapter)
 {
-    JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::Locker lock(jkqtpSaveDataAdapters);
+    JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::WriteLocker lock(jkqtpSaveDataAdapters);
     if (jkqtpSaveDataAdapters.get().contains(adapter)) jkqtpSaveDataAdapters.get().removeAll(adapter);
     return true;
 }
@@ -3285,7 +3287,7 @@ bool JKQTBasePlotter::saveData(const QString& filename, const QString &format) {
 
     QMap<QString, QStringList> saveAdapterFileExtensions;
     {
-        JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::Locker lock(jkqtpSaveDataAdapters);
+        JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::ReadLocker lock(jkqtpSaveDataAdapters);
         for (int i=0; i<jkqtpSaveDataAdapters.get().size(); i++) {
             const QString fid=jkqtpSaveDataAdapters.get()[i]->getFormatID();
             fileformats<<jkqtpSaveDataAdapters.get()[i]->getFilter();
@@ -3371,7 +3373,7 @@ bool JKQTBasePlotter::saveData(const QString& filename, const QString &format) {
             QString fidx=fmt;
             fidx=fidx.remove(0,6);
             int idx=fidx.toInt();
-            JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::Locker lock(jkqtpSaveDataAdapters);
+            JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::ReadLocker lock(jkqtpSaveDataAdapters);
             if (idx>=0 && idx<jkqtpSaveDataAdapters.get().size() && jkqtpSaveDataAdapters.get()[idx]) {
                 QStringList columnNames;
                 const QList<QVector<double> > dataset=datastore->getData(&columnNames);
@@ -3379,7 +3381,7 @@ bool JKQTBasePlotter::saveData(const QString& filename, const QString &format) {
                 return true;
             }
         } else {
-            JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::Locker lock(jkqtpSaveDataAdapters);
+            JKQTPSynchronized<QList<JKQTPSaveDataAdapter*>>::ReadLocker lock(jkqtpSaveDataAdapters);
             for (int i=0; i<jkqtpSaveDataAdapters.get().size(); i++) {
                 if (fmt == jkqtpSaveDataAdapters.get()[i]->getFormatID()) {
                     QStringList columnNames;
@@ -3583,7 +3585,7 @@ bool JKQTBasePlotter::saveImage(const QString& filename, bool displayPreview) {
     //  add JKQTPPaintDeviceAdapter exporters
     const int filtersIndexFirstExporterPLugin=filterstrings.size();
     {
-        JKQTPSynchronized<QList<JKQTPPaintDeviceAdapter*>>::Locker lock(jkqtpPaintDeviceAdapters);
+        JKQTPSynchronized<QList<JKQTPPaintDeviceAdapter*>>::ReadLocker lock(jkqtpPaintDeviceAdapters);
         for (int i=0; i<jkqtpPaintDeviceAdapters.get().size(); i++) {
             filterstrings<<jkqtpPaintDeviceAdapters.get()[i]->getFilter();
             filterextensions<<QStringList();
@@ -3635,7 +3637,7 @@ bool JKQTBasePlotter::saveImage(const QString& filename, bool displayPreview) {
             if (idx<0) idx=findExporterByExtension(fnExt);
             return idx;
         }();
-        JKQTPSynchronized<QList<JKQTPPaintDeviceAdapter*>>::Locker lock(jkqtpPaintDeviceAdapters);
+        JKQTPSynchronized<QList<JKQTPPaintDeviceAdapter*>>::ReadLocker lock(jkqtpPaintDeviceAdapters);
         // now we determine whether we selected a jkqtpPaintDeviceAdapters, if not adapterID will be <0
         const int adapterID=[&](){
             int idx=filtID-filtersIndexFirstExporterPLugin;
diff --git a/screenshots/multithreaded.png b/screenshots/multithreaded.png
index ed43bd89b5..11654b96b4 100644
Binary files a/screenshots/multithreaded.png and b/screenshots/multithreaded.png differ
diff --git a/screenshots/multithreaded_small.png b/screenshots/multithreaded_small.png
index d0e8537699..961d15b9ac 100644
Binary files a/screenshots/multithreaded_small.png and b/screenshots/multithreaded_small.png differ