Hello, If you don't mind a little inefficency, there's always the pbm,pbm,and ppm fgraphics file formats (respecitively 1-bit, grayscale, 24bit color) Takes 10 -- 120 seconds to completely understand the format, the higher number only if you've been recently hit on the head. They're perfect for those 3-am-and-I've-never-written- a-graphics-file sort of scenarios. And, xv can view these formats. If you need a more standard format, just run 'em through a conversion utility like Image Magick's convert . Barry --- Barry Isralewitz Theoretical Biophysics Group Beckman 3121 Office Phone: (217) 244-1612 Home Phone: (217) 337-6364 email: barryi@ks.uiuc.edu http://www.ks.uiuc.edu/~barryi