Scans that will be viewed only onscreen and not printed 72 ppi is generally

considered enough for onscreen viewing. Just remember that when you scan at this low resolution, you won't get a good print at a decent size if you change your mind later on. If there's any chance you'll want to print your image, then you're better off scanning at a print resolution (see the next bullet list item) and then creating a separate, downsized copy for onscreen viewing. Better yet, just look at the pixel dimensions of your scan and forget the ppi entirely.

• Scans for printing .300 ppi is pretty standard, unless you're going to enlarge the image or you need to do a lot of really close editing work on it.

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