Let's have a look at InDesign's work area. You have a Menu Bar on top, the tools and the palettes. Palettes are little windows which have specialized functions, e.g., you have got one that handles colours, one that handles paragraphs, one that handles pages, etc. By default, there is a special palette just under the Menu Bar called Control Palette. This one changes depending on what tool you are using or what you are doing while you are working with the different items of your layout.
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