diff --git a/sources/exportdialog.cpp b/sources/exportdialog.cpp
index 8946cb153..9d171ad8a 100644
--- a/sources/exportdialog.cpp
+++ b/sources/exportdialog.cpp
@@ -872,18 +872,18 @@ void ExportDialog::slot_changeFilesExtension(bool force_extension) {
 	// set maximum width / height according specifications of export-type
 	if (format_extension == ".bmp") {
 		foreach (auto line, diagram_lines_.values() ) {
-			line->width ->setRange(1, 32768);
-			line->height->setRange(1, 32768);
+			line->width ->setRange(1, BMPmaxSize);
+			line->height->setRange(1, BMPmaxSize);
 		}
 	} else if (format_extension == ".jpg") {
 		foreach (auto line, diagram_lines_.values() ) {
-			line->width ->setRange(1, 65535);
-			line->height->setRange(1, 65535);
+			line->width ->setRange(1, JPGmaxSize);
+			line->height->setRange(1, JPGmaxSize);
 		}
 	} else {
 		foreach (auto line, diagram_lines_.values() ) {
-			line->width ->setRange(1, 100000);
-			line->height->setRange(1, 100000);
+			line->width ->setRange(1, GeneralMaxSize);
+			line->height->setRange(1, GeneralMaxSize);
 		}
 	}
 
@@ -1026,16 +1026,16 @@ ExportDialog::ExportDiagramLine::ExportDiagramLine(Diagram *dia, QSize diagram_s
 	file_name -> setMinimumWidth(280);
 	
 	width = new QSpinBox();
-	width -> setRange(1, 100000);
+	width -> setRange(1, GeneralMaxSize);
 	width -> setSuffix(tr("px"));
 	width -> setValue(diagram_size.width());
 	
 	height = new QSpinBox();
-	height -> setRange(1, 100000);
+	height -> setRange(1, GeneralMaxSize);
 	height -> setSuffix(tr("px"));
 	height -> setValue(diagram_size.height());
 	
-	x_label = new QLabel("*");
+	x_label = new QLabel("×");
 	
 	keep_ratio = new QPushButton();
 	keep_ratio -> setCheckable(true);
diff --git a/sources/exportdialog.h b/sources/exportdialog.h
index b0b19602a..31bef13f3 100644
--- a/sources/exportdialog.h
+++ b/sources/exportdialog.h
@@ -79,6 +79,11 @@ class ExportDialog : public QDialog {
 	QSignalMapper *reset_mapper_;
 	QSignalMapper *clipboard_mapper_;
 	
+	// constants for exporting images:
+	static const int BMPmaxSize     =  32767;
+	static const int JPGmaxSize     =  65535;
+	static const int GeneralMaxSize = 100000;
+	
 	// project whose diagrams are to be exported
 	QETProject *project_;