I've had the same issue with my CAD: http://www.biffuz.it/news.php?id=73 I was experimenting with and without double buffering. Here I was forced to use the latter, which is slower. As previously said in this thread, antialiasing is nice - but there should by an option to turn it off if I want full control of the pixels. Regards, Gabriele - www.biffuz.it