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Hi,When I try to use tvmark to circle the stars I have added to the image via addstar, the circles that correspond to the coordinate file produced by addstar does not line up with the actual location of the stars on the image. Any help would be greatly appreciated. Ki

One way this might happen is if your display frame buffer isn't big enough for the image, or if you display the image with the 'fill' parameter turned on. TVMARK works off of pixel coords, so long as you don't pisition the image other than in the center of the frame buffer or scale it somehow and assuming the coords are correct, the circles should line up.-Mike

Thanks Mike i'll look into that-Ki