diff --git a/EGrScene.h b/EGrScene.h
index 90d5979..d91f6cc 100644
--- a/EGrScene.h
+++ b/EGrScene.h
@@ -44,7 +44,6 @@ class IEGrScene
       virtual std::string GetGLSLInfo( void) = 0 ;
       virtual std::string GetPixelFormatInfo( void) = 0 ;
       virtual bool RedrawWindow( void) = 0 ;
-      virtual bool SetExtension( const BBox3d& b3Ext) = 0 ;
       virtual bool Reshape( int nW, int nH) = 0 ;
       virtual bool SetBackground( Color BackTop, Color BackBottom) = 0 ;
       virtual bool Prepare( void) = 0 ;
@@ -65,6 +64,14 @@ class IEGrScene
       virtual bool ZoomAll( void) = 0 ;
       virtual bool ZoomChange( double dCoeff) = 0 ;
       virtual bool ZoomOnPoint( const Point3d& ptWin, double dCoeff) = 0 ;
+      virtual bool ZoomWin( const Point3d& ptWin1, const Point3d& ptWin2) = 0 ;
+     // Geometry
+      virtual bool SetExtension( const BBox3d& b3Ext) = 0 ;
+      virtual bool UpdateExtension( void) = 0 ;
+     // Aux
+      virtual bool SetWinRectAttribs( bool bOutline, Color WRcol) = 0 ;
+      virtual bool SetWinRect( const Point3d& ptWinRectP1, const Point3d& ptWinRectP2) = 0 ;
+      virtual bool ResetWinRect( void) = 0 ;
 } ;
 
 //-----------------------------------------------------------------------------