rulerMap.Add( ScrollMode::Y_AXIS_SCROLL_ENABLED, true );
rulerMap.Add( ScrollMode::Y_AXIS_SNAP_TO_INTERVAL, pageSize.height );
rulerMap.Add( ScrollMode::Y_AXIS_SCROLL_BOUNDARY, pageSize.height*3 );
rulerMap.Add( ScrollMode::Y_AXIS_SCROLL_ENABLED, true );
rulerMap.Add( ScrollMode::Y_AXIS_SNAP_TO_INTERVAL, pageSize.height );
rulerMap.Add( ScrollMode::Y_AXIS_SCROLL_BOUNDARY, pageSize.height*3 );