diff --git a/doc/images/jkqtmathtext/jkqtmathtext_unicode.png b/doc/images/jkqtmathtext/jkqtmathtext_unicode.png
index 3f8f971062..d8bf9ec46a 100644
Binary files a/doc/images/jkqtmathtext/jkqtmathtext_unicode.png and b/doc/images/jkqtmathtext/jkqtmathtext_unicode.png differ
diff --git a/lib/jkqtcommon/jkqtpbasicimagetools.h b/lib/jkqtcommon/jkqtpbasicimagetools.h
index c8ab6a29cb..597f3d58f4 100644
--- a/lib/jkqtcommon/jkqtpbasicimagetools.h
+++ b/lib/jkqtcommon/jkqtpbasicimagetools.h
@@ -1035,16 +1035,19 @@ inline QRgb jkqtp_qRgbOpaque(QRgb col) {
 class JKQTCOMMON_LIB_EXPORT JKQTPPaletteList: public QList<QPair<double, QRgb> >
 {
 public:
-    typedef QList<QPair<double, QRgb> > ListType;
-    JKQTPPaletteList(): ListType() {};
-    JKQTPPaletteList(qsizetype size): ListType(size) {};
-    JKQTPPaletteList(qsizetype size, ListType::parameter_type value): ListType(size, value) {};
+    typedef QPair<double, QRgb> parameter_type;
+    typedef QList<parameter_type> ListType;
+    inline JKQTPPaletteList(): ListType() {};
+#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
+    inline JKQTPPaletteList(qsizetype size): ListType(size) {};
+    inline JKQTPPaletteList(qsizetype size, parameter_type value): ListType(size, value) {};
+#endif
     template <class T>
-    JKQTPPaletteList(std::initializer_list<QPair<double, QRgb>> args): ListType(args) {};
+    inline JKQTPPaletteList(std::initializer_list<QPair<double, QRgb>> args): ListType(args) {};
     template <typename InputIterator, QtPrivate::IfIsInputIterator<InputIterator> = true>
-    JKQTPPaletteList(InputIterator first, InputIterator last): ListType(first, last) {};
-    JKQTPPaletteList(ListType &&other):ListType(std::forward<ListType>(other)) {};
-    JKQTPPaletteList(const ListType &other):ListType(other) {};
+    inline JKQTPPaletteList(InputIterator first, InputIterator last): ListType(first, last) {};
+    inline JKQTPPaletteList(ListType &&other):ListType(std::forward<ListType>(other)) {};
+    inline JKQTPPaletteList(const ListType &other):ListType(other) {};
 
     using ListType::push_back;
     inline void push_back(QRgb rgb) {
@@ -1066,7 +1069,7 @@ public:
     }
 
     /** \brief returns the minimum value of the double-component */
-    double getMinPosition() const {
+    inline double getMinPosition() const {
         double mi=0;
         bool first=true;
         for (const auto& c: *this) {
@@ -1080,7 +1083,7 @@ public:
         return mi;
     }
     /** \brief returns the maximum value of the double-component */
-    double getMaxPosition() const {
+    inline double getMaxPosition() const {
         double ma=0;
         bool first=true;
         for (const auto& c: *this) {
@@ -1094,7 +1097,7 @@ public:
         return ma;
     }
     /** \brief returns the minimum and maximum value of the double-component, as well as the avg. increment between two such values */
-    void getMinMaxPosition(double& mi, double& ma, double* avgDelta=nullptr) const {
+    inline void getMinMaxPosition(double& mi, double& ma, double* avgDelta=nullptr) const {
         mi=ma=0;
         bool first=true;
         for (const auto& c: *this) {
diff --git a/lib/jkqtcommon/jkqtpstringtools.cpp b/lib/jkqtcommon/jkqtpstringtools.cpp
index 3d01ef91b9..e4ed74735c 100644
--- a/lib/jkqtcommon/jkqtpstringtools.cpp
+++ b/lib/jkqtcommon/jkqtpstringtools.cpp
@@ -752,12 +752,12 @@ QColor jkqtp_String2QColor(QString color)
     if (rxColMod.exactMatch(color)) {
         QColor col(Qt::black);
         const QString name=rxColMod.cap(1);
-        const int v1=valPercToInt(rxColMod.cap(2), rxColMod.cap(3));
-        const int h1=valUnitToInt(mColMod.captured(2), mColMod.captured(3), INT_MAX);
-        const int v2=valPercToInt(rxColMod.cap(4), rxColMod.cap(5));
-        const int a2=valPercToAInt(rxColMod.cap(4), rxColMod.cap(5));
-        const int v3=valPercToInt(rxColMod.cap(6), rxColMod.cap(7));
-        const int a4=valPercToAInt(rxColMod.cap(8), rxColMod.cap(9));
+        const int v1=valUnitToInt(rxColMod.cap(2), rxColMod.cap(3));
+        const int h1=valUnitToInt(rxColMod.cap(2), rxColMod.cap(3), INT_MAX);
+        const int v2=valUnitToInt(rxColMod.cap(4), rxColMod.cap(5));
+        const int a2=valUnitToAlphaInt(rxColMod.cap(4), rxColMod.cap(5));
+        const int v3=valUnitToInt(rxColMod.cap(6), rxColMod.cap(7));
+        const int a4=valUnitToAlphaInt(rxColMod.cap(8), rxColMod.cap(9));
         if (name=="gray"||name=="grey") {
             if (v2<0) col.setRgb(v1,v1,v1);
             else col.setRgb(v1,v1,v1,a2);
diff --git a/lib/jkqtplotter/jkqtplotter.cpp b/lib/jkqtplotter/jkqtplotter.cpp
index 5f00265c7e..bc4a3c4cac 100644
--- a/lib/jkqtplotter/jkqtplotter.cpp
+++ b/lib/jkqtplotter/jkqtplotter.cpp
@@ -31,7 +31,7 @@
 #include "jkqtplotter.h"
 
 
-std::atomic<int> JKQTPlotter::jkqtp_RESIZE_DELAY = 100;
+std::atomic<int> JKQTPlotter::jkqtp_RESIZE_DELAY(100);
 
 void JKQTPlotter::setGlobalResizeDelay(int delayMS)
 {
diff --git a/lib/jkqtplotter/jkqtplotter.h b/lib/jkqtplotter/jkqtplotter.h
index 3da09bda37..4a83c9b273 100644
--- a/lib/jkqtplotter/jkqtplotter.h
+++ b/lib/jkqtplotter/jkqtplotter.h
@@ -40,6 +40,7 @@
 #include <vector>
 #include <cmath>
 #include <iostream>
+#include <atomic>
 
 #include "jkqtplotter/jkqtpbaseplotter.h"
 #include "jkqtplotter/jkqtplotterstyle.h"
diff --git a/lib/jkqtplotter/jkqtptools.cpp b/lib/jkqtplotter/jkqtptools.cpp
index 37fe70c2ff..cac444b71f 100644
--- a/lib/jkqtplotter/jkqtptools.cpp
+++ b/lib/jkqtplotter/jkqtptools.cpp
@@ -677,8 +677,13 @@ JKQTPColorDerivationMode JKQTPColorDerivationMode::fromString(const QString &mod
                                  return rx4;
             }();
 #endif
-    for (QString p: parts) {
-        p=p.removeIf([](QChar c) { return c.isSpace()||c=='\t';}).trimmed();
+    for (QString pin: parts) {
+        QString p;
+        p.reserve(pin.size());
+        for (auto c: pin) {
+            if (!c.isSpace()&&c!='\t') p.append(c);
+        }
+        p=p.trimmed();
         if (p=="same_color") res.colorModification=ColorChangeMode::SameColor;
         else if (p=="invert"||p=="inverted"||p=="inverted_color") res.colorModification=ColorChangeMode::InvertColor;
         else if (p=="invert"||p=="inverted"||p=="inverted_color") res.colorModification=ColorChangeMode::InvertColor;
@@ -694,7 +699,7 @@ JKQTPColorDerivationMode JKQTPColorDerivationMode::fromString(const QString &mod
                 const QString instr=m1arg.captured(1).trimmed();
                 const QString arg1=m1arg.captured(2).trimmed();
 #else
-            if (rx1arg.indexIn(slt[i])>=0) {
+            if (rx1arg.indexIn(p)>=0) {
                 const QString instr=rx1arg.cap(1).trimmed();
                 const QString arg1=rx1arg.cap(2).trimmed();
 #endif
diff --git a/screenshots/parsedfunctionplot.png b/screenshots/parsedfunctionplot.png
index 4d28d5352a..4ab500ef9e 100644
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diff --git a/screenshots/parsedfunctionplot_small.png b/screenshots/parsedfunctionplot_small.png
index b324e66f2c..2cc88637fe 100644
Binary files a/screenshots/parsedfunctionplot_small.png and b/screenshots/parsedfunctionplot_small.png differ