diff --git a//home/hp/DEV/QET/QET-5735 - origineel/sources/diagram.h b//home/hp/DEV/QET/QET-5735/sources/diagram.h
index .. 100644
--- a//home/hp/DEV/QET/QET-5735 - origineel/sources/diagram.h
+++ b//home/hp/DEV/QET/QET-5735/sources/diagram.h
@@ -73,12 +73,17 @@
 		/// Diagram dimensions and title block
 		BorderTitleBlock border_and_titleblock;
 		/// abscissa grid step size
-		static const int xGrid;
+		static int xGrid;
 		/// ordinate grid step size
-		static const int yGrid;
-		/// margin around the diagram
+		static int yGrid;
+        /// Key grid x step size
+        static int xKeyGrid;
+        /// Key grid y step size
+        static int yKeyGrid;
+        /// margin around the diagram
 		static const qreal margin;
 		/// background color of diagram
+                
 		static QColor background_color;
 		/// Hash containing max values for folio sequential autonums in this diagram
 		QHash <QString, QStringList> m_elmt_unitfolio_max;