Well it seems I have found a solution that seems to work. I just need to use vtkTransform2D available in the vtkChartXY on each "plot corner". Cheers Nicolas -- View this message in context: http://vtk.1045678.n5.nabble.com/Chart-coordinate-conversions-tp3317405p3317411.html Sent from the VTK - Users mailing list archive at Nabble.com.