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Hidden Characters
In QuarkXPress, characters which don't printtabs, spaces, ends of paragraphs, and so onare called invisibles . InDesign calls these hidden characters , and you make them visible (or invisible again) by selecting Show Hidden Characters from the Type menu or pressing Command-Option-I/Ctrl-Alt-I. (In XPress, the shortcut is simply Command-I/Ctrl-I.) The characters appear in the color of the current layer.
