BTW, I am using the Examples\GUI\Qt\FourPaneViewer\QtVTKRenderWindows.cxx as a reference for my application. -- View this message in context: http://vtk.1045678.n5.nabble.com/vtkImagePlaneWidget-edit-slice-before-rendering-tp5723499p5723501.html Sent from the VTK - Users mailing list archive at Nabble.com.