Working with Flash documents
View a document when multiple documents are open
When you open multiple documents, tabs at the top of the Document window identify the open documents and let you easily navigate among them. Tabs appear only when documents are maximized in the Document window.
If You want to change currently viewed document click the tab of the document you want to view.
By default, tabs appear in the order in which the documents were created. You can drag the document tabs to change their order.
In general having more than one document open is useful. You may for example copy one or more symbols from Flash animation You drew a moth ago, and past them to newly created.