Flash authoring panels
The Library panel
The Library panel is where you store and organize symbols created in Flash, as well as imported files, including bitmap graphics, sound files, and video clips. The Library panel lets you organize library items in folders, see how often an item is used in a document, and sort items by type.
To display the Library panel, select Window > Library, or press Control+L (Windows) or Command+L (Macintosh).
You will learn more about managing media assets with the Flash document library later. Now just have o mind that the Library exist and might be helpful.