After you create a symbol, you can create instances of that symbol throughout your document, including inside other symbols. When you modify the symbol, Flash Professional updates all instances of the symbol.
You can give names to instances from the Property inspector. Use the instance name to refer to an instance in ActionScript. To control instances with ActionScript®, give each instance within a single timeline a unique name. For more information, see Handling events in Learning ActionScript 2.0 in Adobe Flash or Handling events in the ActionScript 3.0 Developer’s Guide.
To specify color effects, assign actions, set the graphic display mode, or change the behavior of new instances, use the Property inspector. The behavior of the instance is the same as the symbol behavior, unless you specify otherwise. Any changes you make affect only the instance and not the symbol.