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A symbol is a reusable object, and an instance is an occurrence of a symbol on the Stage. Repeated use of instances does not increase the file size and is a good part of a strategy for keeping a document file size small. Symbols also simplify editing a document; when you edit a symbol, all instances of the symbol update to reflect the edits. Another benefit of symbols is that they allow you to create sophisticated interactivity.
In this lesson you'll work with symbols and instances to accomplish the following tasks:
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