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As you can see, Xcode's editor provides a lot of features designed to make your editing sessions fluid and productive. Learning to use the various navigation controls will make moving around within a file, and between files, quick and efficient. After you get the feel for Code Sense, stopping to look up a function name or mistyping a local variable name should become a thing of the past.
You probably won't absorb all of Xcode's editing features in a single day. As you use Xcode to edit files, revisit this chapter from time to time to reacquaint yourself with some of the more esoteric features.