> Guess what... I tested this on my real A1200 and lines 0 to 6 (values > from overscan prefs) are _not_ visible on my 1081 monitor in NTSC-mode > (with height adjusted so i can see whole screen) Very interesting. Thanks for checking this. I guess I should have dug out my 1200. I wanted to paint some dvd size images (720x480) and thought I had done that on the 1200. But I was probably doing pal at 720x566. So I just tried opening a PAL screen at 720x480 and it's fine. All lines there. don