Quote:
Originally Posted by HarryT
GIF is excellent for line drawings, graphs, charts, text, etc - anything with blocks of the same colour, and sharp "edges" in the picture. It shouldn't be used for "photographic" images.
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PNG can do exactly the same as GIF (except animated GIFs, which shouldn't be used in books, anyway), with a usually smaller filesize. Plus, it can do more things. And it has always been patent-free. Really, I see no point in using GIF instead of PNG, unless a device/format/software doesn't support PNG.