diff --git a/lib/jkqtplotter/graphs/jkqtpbarchart.h b/lib/jkqtplotter/graphs/jkqtpbarchart.h
index 585305d78d..c5718275d2 100644
--- a/lib/jkqtplotter/graphs/jkqtpbarchart.h
+++ b/lib/jkqtplotter/graphs/jkqtpbarchart.h
@@ -104,15 +104,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalGraph: public JKQTPBarGraphBase {
         /** \brief plots the graph to the plotter object specified as parent */
         virtual void draw(JKQTPEnhancedPainter& painter) override;
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
     public Q_SLOTS:
@@ -242,15 +236,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarHorizontalGraph: public JKQTPBarGraphBase {
         /** \brief plots the graph to the plotter object specified as parent */
         virtual void draw(JKQTPEnhancedPainter& painter) override;
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
         /** \brief returns the column used as "key" for the current graph (typically this call getXColumn(), but for horizontal graphs like filled curves or barcharts it may call getYColumn() ) */
         virtual int getKeyColumn() const override;
@@ -290,10 +278,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarHorizontalErrorGraph: public JKQTPBarHorizo
 
         /** \copydoc JKQTPGraph::usesColumn() */
         virtual bool usesColumn(int c) const override;
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
 
 
diff --git a/lib/jkqtplotter/graphs/jkqtpboxplot.h b/lib/jkqtplotter/graphs/jkqtpboxplot.h
index 9db83e6386..92001c2dd6 100644
--- a/lib/jkqtplotter/graphs/jkqtpboxplot.h
+++ b/lib/jkqtplotter/graphs/jkqtpboxplot.h
@@ -114,15 +114,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBoxplotVerticalGraph: public JKQTPBoxplotGraph
         /** \brief plots a key marker inside the specified rectangle \a rect */
         virtual void drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) override;
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
     protected:
@@ -156,15 +150,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBoxplotHorizontalGraph: public JKQTPBoxplotGra
         virtual void drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) override;
 
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 };
 
@@ -211,15 +199,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBoxplotVerticalElement: public JKQTPBoxplotEle
         virtual void drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) override;
 
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 
@@ -258,15 +240,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBoxplotHorizontalElement: public JKQTPBoxplotE
         virtual void drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) override;
 
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 };
 
diff --git a/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h b/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h
index 5804c015e7..88f4e74a2d 100644
--- a/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h
+++ b/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h
@@ -323,14 +323,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXFunctionLineGraph: public JKQTPFunctorLineGra
         /** \copydoc JKQTPEvaluatedFunctionWithErrorsGraphBase::buildPlotFunctorSpec() */
         virtual std::function<QPointF(double)> buildErrorFunctorSpec() override;
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * This functions returns 0 for both parameters, so that the plotter uses the predefined
-         * min and max values.
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 
@@ -379,11 +374,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPYFunctionLineGraph: public JKQTPFunctorLineGra
         virtual std::function<QPointF(double)> buildErrorFunctorSpec() override;
 
 
-        /** \brief get the maximum and minimum x-value of the graph
-         */
-        virtual bool getXMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
+        virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 
diff --git a/lib/jkqtplotter/graphs/jkqtpevaluatedfunctionbase.h b/lib/jkqtplotter/graphs/jkqtpevaluatedfunctionbase.h
index 94414eb826..ee1f9cc711 100644
--- a/lib/jkqtplotter/graphs/jkqtpevaluatedfunctionbase.h
+++ b/lib/jkqtplotter/graphs/jkqtpevaluatedfunctionbase.h
@@ -84,14 +84,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPEvaluatedFunctionGraphBase: public JKQTPGraph
         /** \brief class destructor */
         virtual ~JKQTPEvaluatedFunctionGraphBase() ;
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * This functions returns 0 for both parameters, so that the plotter uses the predefined
-         * min and max values.
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
         /** \brief sets the params as a pointer to an internal COPY of the given vector (not the data of the vector, as then the size would be unknown!!!) */
diff --git a/lib/jkqtplotter/graphs/jkqtpfilledcurve.h b/lib/jkqtplotter/graphs/jkqtpfilledcurve.h
index 1c5d507c39..57249c0aa9 100644
--- a/lib/jkqtplotter/graphs/jkqtpfilledcurve.h
+++ b/lib/jkqtplotter/graphs/jkqtpfilledcurve.h
@@ -215,10 +215,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPFilledCurveYGraph: public JKQTPFilledCurveGrap
         /** \brief class constructor */
         JKQTPFilledCurveYGraph(JKQTPlotter* parent);
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
 
         /** \brief plots the graph to the plotter object specified as parent */
@@ -253,10 +250,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPFilledCurveYErrorGraph: public JKQTPFilledCurv
         /** \copydoc JKQTPGraph::usesColumn() */
         virtual bool usesColumn(int c) const override;
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
 
 
diff --git a/lib/jkqtplotter/graphs/jkqtpgeoannotations.h b/lib/jkqtplotter/graphs/jkqtpgeoannotations.h
index a027474c1b..ae1db820a1 100644
--- a/lib/jkqtplotter/graphs/jkqtpgeoannotations.h
+++ b/lib/jkqtplotter/graphs/jkqtpgeoannotations.h
@@ -144,9 +144,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoSymbol: public JKQTPPlotAnnotationElement,
         /** \brief returns x and y at the same time \see x, y */
         QPointF getP() const;
 
-        /** \copydoc JKQTPPlotAnnotationElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPPlotAnnotationElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
         /** \brief plots the graph to the plotter object specified as parent */
diff --git a/lib/jkqtplotter/graphs/jkqtpgeolines.h b/lib/jkqtplotter/graphs/jkqtpgeolines.h
index 61fa1f6cf8..5e01f015da 100644
--- a/lib/jkqtplotter/graphs/jkqtpgeolines.h
+++ b/lib/jkqtplotter/graphs/jkqtpgeolines.h
@@ -120,9 +120,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoLine: public JKQTPGeoBaseDecoratedLine {
 
 
 
-        /** \copydoc JKQTPGeometricPlotElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPGeometricPlotElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
         /** \brief plots the graph to the plotter object specified as parent
@@ -299,9 +299,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoInfiniteLine: public JKQTPGeoBaseDecoratedH
         JKQTPGeoInfiniteLine(JKQTPlotter* parent, double x, double y, double dx, double dy);
 
 
-        /** \copydoc JKQTPGeometricPlotElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPGeometricPlotElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
         /** \brief plots the graph to the plotter object specified as parent
@@ -402,9 +402,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoPolyLines: public JKQTPGeoBaseDecoratedLine
         JKQTPGeoPolyLines(JKQTPlotter* parent);
 
 
-        /** \copydoc JKQTPGeometricPlotElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPGeometricPlotElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
         /** \brief plots the graph to the plotter object specified as parent
@@ -494,9 +494,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoArc: public JKQTPGeoBaseLine {
          */
         JKQTPGeoArc(JKQTPlotter* parent, double x, double y, double width, double height, double angleStart, double angleStop);
 
-        /** \copydoc JKQTPGeometricPlotElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPGeometricPlotElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 
diff --git a/lib/jkqtplotter/graphs/jkqtpgeoshapes.h b/lib/jkqtplotter/graphs/jkqtpgeoshapes.h
index 12128673a0..80bb1fc4b8 100644
--- a/lib/jkqtplotter/graphs/jkqtpgeoshapes.h
+++ b/lib/jkqtplotter/graphs/jkqtpgeoshapes.h
@@ -115,9 +115,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoRectangle: public JKQTPGeoBaseFilled {
 
 
 
-        /** \copydoc JKQTPGeometricPlotElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPGeometricPlotElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
         /** \brief plots the graph to the plotter object specified as parent
@@ -231,9 +231,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoPolygon: public JKQTPGeoBaseFilled {
         JKQTPGeoPolygon(JKQTPlotter* parent, DrawMode drawMode=DrawAsGraphicElement);
 
 
-        /** \copydoc JKQTPGeometricPlotElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPGeometricPlotElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
         /** \brief plots the graph to the plotter object specified as parent
@@ -430,9 +430,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoPie: public JKQTPGeoEllipse {
         JKQTPGeoPie(JKQTPlotter* parent, double x, double y, double width, double height, double angleStart, double angleStop, DrawMode drawMode=DrawAsGraphicElement);
 
 
-        /** \copydoc JKQTPGeometricPlotElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPGeometricPlotElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 
@@ -502,9 +502,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGeoChord: public JKQTPGeoPie {
          */
         JKQTPGeoChord(JKQTPlotter* parent, double x, double y, double width, double height, double angleStart, double angleStop, DrawMode drawMode=DrawAsGraphicElement);
 
-        /** \copydoc JKQTPGeometricPlotElement::getXMinMax()        */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPGeometricPlotElement::getYMinMax()        */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
         /** \brief plots the graph to the plotter object specified as parent
diff --git a/lib/jkqtplotter/graphs/jkqtpimage.h b/lib/jkqtplotter/graphs/jkqtpimage.h
index c9c4ad0eae..67f32b555e 100644
--- a/lib/jkqtplotter/graphs/jkqtpimage.h
+++ b/lib/jkqtplotter/graphs/jkqtpimage.h
@@ -73,15 +73,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPImageBase: public JKQTPGraph {
         /** \brief plots a key marker inside the specified rectangle \a rect */
         virtual void drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) override;
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
         /** \brief returns the color to be used for the key label */
         virtual QColor getKeyLabelColor() const override;
diff --git a/lib/jkqtplotter/graphs/jkqtpimpulses.h b/lib/jkqtplotter/graphs/jkqtpimpulses.h
index 3f6ab0ab17..82e304c171 100644
--- a/lib/jkqtplotter/graphs/jkqtpimpulses.h
+++ b/lib/jkqtplotter/graphs/jkqtpimpulses.h
@@ -126,9 +126,9 @@ public:
     virtual int getValueColumn() const override;
 
 
-    /** \copydoc JKQTPXYGraph::getXMinMax() */
+    /** \copydoc JKQTPPlotElement::getXMinMax() */
     virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-    /** \copydoc JKQTPXYGraph::getYMinMax() */
+    /** \copydoc JKQTPPlotElement::getYMinMax() */
     virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 public Q_SLOTS:
@@ -158,7 +158,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPImpulsesHorizontalErrorGraph: public JKQTPImpu
         /** \copydoc JKQTPGraph::usesColumn() */
         virtual bool usesColumn(int c) const override;
 
-        /** \copydoc JKQTPXYGraph::getXMinMax() */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
 
         /** \brief returns the column that contains the bar height errors */
@@ -214,9 +214,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPImpulsesVerticalGraph: public JKQTPImpulsesGra
         virtual void draw(JKQTPEnhancedPainter& painter) override;
         /** \brief plots a key marker inside the specified rectangle \a rect */
         virtual void drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) override;
-        /** \copydoc JKQTPXYGraph::getXMinMax() */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \copydoc JKQTPXYGraph::getYMinMax() */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 };
 
diff --git a/lib/jkqtplotter/graphs/jkqtplines.h b/lib/jkqtplotter/graphs/jkqtplines.h
index 408e1965b5..9b72a8ceb9 100644
--- a/lib/jkqtplotter/graphs/jkqtplines.h
+++ b/lib/jkqtplotter/graphs/jkqtplines.h
@@ -117,15 +117,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXYLineErrorGraph: public JKQTPXYLineGraph, pub
         /** \brief class constructor */
         JKQTPXYLineErrorGraph(JKQTPlotter* parent);
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
         /** \copydoc JKQTPGraph::usesColumn() */
         virtual bool usesColumn(int c) const override;
diff --git a/lib/jkqtplotter/graphs/jkqtppeakstream.h b/lib/jkqtplotter/graphs/jkqtppeakstream.h
index 3a135a06f6..adaa554b64 100644
--- a/lib/jkqtplotter/graphs/jkqtppeakstream.h
+++ b/lib/jkqtplotter/graphs/jkqtppeakstream.h
@@ -52,15 +52,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPPeakStreamGraph: public JKQTPSingleColumnGraph
         JKQTPPeakStreamGraph(JKQTBasePlotter* parent=nullptr);
         JKQTPPeakStreamGraph(JKQTPlotter* parent);
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 
diff --git a/lib/jkqtplotter/graphs/jkqtpscatter.h b/lib/jkqtplotter/graphs/jkqtpscatter.h
index 96e6c73f3d..d6070cc204 100644
--- a/lib/jkqtplotter/graphs/jkqtpscatter.h
+++ b/lib/jkqtplotter/graphs/jkqtpscatter.h
@@ -101,15 +101,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXYScatterErrorGraph: public JKQTPXYScatterGrap
         /** \brief class constructor */
         JKQTPXYScatterErrorGraph(JKQTPlotter* parent);
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
         /** \copydoc JKQTPGraph::usesColumn() */
         virtual bool usesColumn(int c) const override;
@@ -441,15 +435,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXYParametrizedErrorScatterGraph: public JKQTPX
         JKQTPXYParametrizedErrorScatterGraph(JKQTPlotter* parent);
 
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
         /** \copydoc JKQTPGraph::usesColumn() */
         virtual bool usesColumn(int c) const override;
diff --git a/lib/jkqtplotter/graphs/jkqtpsinglecolumnsymbols.h b/lib/jkqtplotter/graphs/jkqtpsinglecolumnsymbols.h
index 5357ca92df..c56f9eae33 100644
--- a/lib/jkqtplotter/graphs/jkqtpsinglecolumnsymbols.h
+++ b/lib/jkqtplotter/graphs/jkqtpsinglecolumnsymbols.h
@@ -65,15 +65,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPSingleColumnSymbolsGraph: public JKQTPSingleCo
         JKQTPSingleColumnSymbolsGraph(JKQTBasePlotter* parent=nullptr);
         JKQTPSingleColumnSymbolsGraph(JKQTPlotter* parent);
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 
diff --git a/lib/jkqtplotter/graphs/jkqtpviolinplot.h b/lib/jkqtplotter/graphs/jkqtpviolinplot.h
index c71e0061ac..84cb1555ba 100644
--- a/lib/jkqtplotter/graphs/jkqtpviolinplot.h
+++ b/lib/jkqtplotter/graphs/jkqtpviolinplot.h
@@ -178,15 +178,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPViolinplotVerticalElement: public JKQTPViolinp
 
 
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
 
@@ -233,15 +227,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPViolinplotHorizontalElement: public JKQTPVioli
         virtual void drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) override;
 
 
-        /** \brief get the maximum and minimum x-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-        /** \brief get the maximum and minimum y-value of the graph
-         *
-         * The result is given in the two parameters which are call-by-reference parameters!
-         */
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 };
 
diff --git a/lib/jkqtplotter/jkqtpgraphsbase.h b/lib/jkqtplotter/jkqtpgraphsbase.h
index 37ff287411..ad12e87f15 100644
--- a/lib/jkqtplotter/jkqtpgraphsbase.h
+++ b/lib/jkqtplotter/jkqtpgraphsbase.h
@@ -81,11 +81,21 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPPlotElement: public QObject {
         /** \brief get the maximum and minimum x-value of the graph
          *
          * The result is given in the two parameters which are call-by-reference parameters!
+         *
+         * \param[out] minx minimal x-value used in the graph
+         * \param[out] maxx maximal x-value used in the graph
+         * \param[out] smallestGreaterZero the smalles x-value in the graph, which is larger than 0 (this is used in auto-sizing for logarithmic axes)
+         * \return \c true on success, i.e. if there were datapoints in the plot, or \c false on failure (e.g. when the graph is empty)
          */
         virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero)=0;
         /** \brief get the maximum and minimum y-value of the graph
          *
          * The result is given in the two parameters which are call-by-reference parameters!
+         *
+         * \param[out] miny minimal y-value used in the graph
+         * \param[out] maxy maximal y-value used in the graph
+         * \param[out] smallestGreaterZero the smalles y-value in the graph, which is larger than 0 (this is used in auto-sizing for logarithmic axes)
+         * \return \c true on success, i.e. if there were datapoints in the plot, or \c false on failure (e.g. when the graph is empty)
          */
         virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero)=0;
         /** \brief returns the color to be used for the key label */
@@ -388,7 +398,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPPlotElement: public QObject {
 
 
 
-        /** \brief dataset with graph-points and associated data fro the function hitTest()
+        /** \brief dataset with graph-points and associated data from the function hitTest()
          * \see hitTest(), HitTestLocation
          */
         QVector<HitTestLocation> m_hitTestData;
@@ -590,15 +600,9 @@ public:
     /** \brief class constructor */
     JKQTPXYGraph(JKQTBasePlotter* parent=nullptr);
 
-    /** \brief get the maximum and minimum x-value of the graph
-     *
-     * The result is given in the two parameters which are call-by-reference parameters!
-     */
+    /** \copydoc JKQTPPlotElement::getXMinMax() */
     virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
-    /** \brief get the maximum and minimum y-value of the graph
-     *
-     * The result is given in the two parameters which are call-by-reference parameters!
-     */
+    /** \copydoc JKQTPPlotElement::getYMinMax() */
     virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
     /** \copydoc JKQTPGraph::usesColumn() */
@@ -752,10 +756,7 @@ public:
     JKQTPXYYGraph(JKQTBasePlotter* parent=nullptr);
 
 
-    /** \brief get the maximum and minimum y-value of the graph
-     *
-     * The result is given in the two parameters which are call-by-reference parameters!
-     */
+    /** \copydoc JKQTPPlotElement::getYMinMax() */
     virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
 
     /** \copydoc JKQTPGraph::usesColumn() */
@@ -813,10 +814,7 @@ public:
     JKQTPXXYGraph(JKQTBasePlotter* parent=nullptr);
 
 
-    /** \brief get the maximum and minimum x-value of the graph
-     *
-     * The result is given in the two parameters which are call-by-reference parameters!
-     */
+    /** \copydoc JKQTPPlotElement::getXMinMax() */
     virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
 
     /** \copydoc JKQTPGraph::usesColumn() */
diff --git a/lib/jkqtplotter/jkqtpgraphsbaseerrors.h b/lib/jkqtplotter/jkqtpgraphsbaseerrors.h
index 1a7e728d07..48be6b9eef 100644
--- a/lib/jkqtplotter/jkqtpgraphsbaseerrors.h
+++ b/lib/jkqtplotter/jkqtpgraphsbaseerrors.h
@@ -161,9 +161,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGraphErrorStyleMixin {
         double m_errorLineWidth;
 
 
-        /** \brief fill style of the graph */
+        /** \brief fill brush for the error indicators */
         QBrush m_errorFillBrush;
-        /** \brief last fill color of the graph  */
+        /** \brief fill color for the error indicators  */
         QColor m_errorFillColor;