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DPI - Dots per Inch. Images created for print usually have a dpi of 300 to 800. When receiving an image from an outside source, make sure you look at the dpi. Always keep web images, or any image that is for display on a computer only at 72 dpi. Your monitor can only display 72 pixels per inch, anything more is a waste of hard disk space. Occasionally you may want to scan an image at a higher resolution to remove a moire pattern, or enlarge the image. When you are finished manipulating it, you must still set the dpi back to 72.