diff --git a/lib/jkqtplotter/jkqtpgraphscontour.cpp b/lib/jkqtplotter/jkqtpgraphscontour.cpp
index 966bd21414..f291258f62 100644
--- a/lib/jkqtplotter/jkqtpgraphscontour.cpp
+++ b/lib/jkqtplotter/jkqtpgraphscontour.cpp
@@ -217,6 +217,10 @@ void JKQTPContour::setImageColumn(size_t columnID)
 {
     datatype=JKQTPMathImageBase::DoubleArray;
     data=parent->getDatastore()->getColumnPointer(columnID,0);
+    if (parent && columnID>=0 && parent->getDatastore()) {
+        setNx(parent->getDatastore()->getColumnImageWidth(columnID));
+        setNy(parent->getDatastore()->getColumnImageHeight(columnID));
+    }
 }
 
 
diff --git a/lib/jkqtplotter/jkqtpgraphsimage.cpp b/lib/jkqtplotter/jkqtpgraphsimage.cpp
index 2361c58ecb..b770dcb728 100644
--- a/lib/jkqtplotter/jkqtpgraphsimage.cpp
+++ b/lib/jkqtplotter/jkqtpgraphsimage.cpp
@@ -1741,6 +1741,10 @@ int JKQTPColumnMathImage::getImageColumn() const
 void JKQTPColumnMathImage::setModifierColumn(int __value)
 {
     this->modifierColumn = __value;
+    if (parent && __value>=0 && parent->getDatastore()) {
+        setNx(parent->getDatastore()->getColumnImageWidth(__value));
+        setNy(parent->getDatastore()->getColumnImageHeight(__value));
+    }
 }
 
 int JKQTPColumnMathImage::getModifierColumn() const
diff --git a/lib/jkqtplotter/jkqtpgraphsimageoverlays.cpp b/lib/jkqtplotter/jkqtpgraphsimageoverlays.cpp
index 137c84391c..b6c00805aa 100644
--- a/lib/jkqtplotter/jkqtpgraphsimageoverlays.cpp
+++ b/lib/jkqtplotter/jkqtpgraphsimageoverlays.cpp
@@ -345,6 +345,10 @@ JKQTPColumnOverlayImageEnhanced::JKQTPColumnOverlayImageEnhanced(JKQTPlotter *pa
 void JKQTPColumnOverlayImageEnhanced::setImageColumn(int __value)
 {
     this->imageColumn = __value;
+    if (parent && __value>=0 && parent->getDatastore()) {
+        setNx(parent->getDatastore()->getColumnImageWidth(__value));
+        setNy(parent->getDatastore()->getColumnImageHeight(__value));
+    }
 }
 
 int JKQTPColumnOverlayImageEnhanced::getImageColumn() const
diff --git a/lib/jkqtplotter/jkqtpgraphsimagergb.cpp b/lib/jkqtplotter/jkqtpgraphsimagergb.cpp
index 2d07e571b6..84ba7e8c9f 100644
--- a/lib/jkqtplotter/jkqtpgraphsimagergb.cpp
+++ b/lib/jkqtplotter/jkqtpgraphsimagergb.cpp
@@ -1353,6 +1353,10 @@ int JKQTPColumnRGBMathImage::getModifierColumn() const
 void JKQTPColumnRGBMathImage::setModifierColumn(int __value)
 {
     this->modifierColumn = __value;
+    if (parent && __value>=0 && parent->getDatastore()) {
+        setNx(parent->getDatastore()->getColumnImageWidth(__value));
+        setNy(parent->getDatastore()->getColumnImageHeight(__value));
+    }
 }
 
 int JKQTPColumnRGBMathImage::getImageBColumn() const
@@ -1363,6 +1367,10 @@ int JKQTPColumnRGBMathImage::getImageBColumn() const
 void JKQTPColumnRGBMathImage::setImageBColumn(int __value)
 {
     this->imageBColumn = __value;
+    if (parent && __value>=0 && parent->getDatastore()) {
+        setNx(parent->getDatastore()->getColumnImageWidth(__value));
+        setNy(parent->getDatastore()->getColumnImageHeight(__value));
+    }
 }
 
 int JKQTPColumnRGBMathImage::getImageGColumn() const
@@ -1373,6 +1381,10 @@ int JKQTPColumnRGBMathImage::getImageGColumn() const
 void JKQTPColumnRGBMathImage::setImageGColumn(int __value)
 {
     this->imageGColumn = __value;
+    if (parent && __value>=0 && parent->getDatastore()) {
+        setNx(parent->getDatastore()->getColumnImageWidth(__value));
+        setNy(parent->getDatastore()->getColumnImageHeight(__value));
+    }
 }
 
 int JKQTPColumnRGBMathImage::getImageRColumn() const
@@ -1383,4 +1395,8 @@ int JKQTPColumnRGBMathImage::getImageRColumn() const
 void JKQTPColumnRGBMathImage::setImageRColumn(int __value)
 {
     this->imageRColumn = __value;
+    if (parent && __value>=0 && parent->getDatastore()) {
+        setNx(parent->getDatastore()->getColumnImageWidth(__value));
+        setNy(parent->getDatastore()->getColumnImageHeight(__value));
+    }
 }