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Summary
Photoshop can work with many kinds of graphics files from many sources. Those that it doesn't open directly, either by double-clicking or by using the Open dialog box, can be imported through plug-in filters. If you have a digital camera or scanner, it might have a Photoshop plug-in that enables you to open the image from within Photoshop. Check your owner's manual.Logically enough, Photoshop can also save documents in all the formats it can open (except Raw). Different formats have different purposes and different file sizes. Some are specifically intended for Web use, others for printing. Choose a format based on the intended use of the image.The History palette saves a step-by-step list of everything you do to your picture. You can travel backward or forward through the History list and easily undo or redo your changes, even if you have already saved the document.
