hi, the pix_crop help file says pix_crop does not take arguments, but actually it does, the only problem is that the order is switched. the four inlets are size_x, size_y, x_off, y_off but the arguments have to be given as x_off, y_off, size_x, size_y I guess it is not possible to change that because of backwards compatibility issues, although it is not documented, so people maybe don't know at all?? marius.