Multiple Timelines and levels

The Flash Player has a stacking order of levels. Every Flash document has a main Timeline located at level 0 in the Flash Player. You can use the loadMovie action to load other Flash documents (SWF files) into the Flash Player at different levels. See loadMovie().

If you load documents into levels above level 0, the documents lie on top of one another like drawings on transparent paper; where there is no content on the Stage, you can see through to the content on lower levels. If you load a document into level 0, it replaces the main Timeline. Each document loaded into a level of the Flash Player has its own Timeline.

When you add a movie clip instance to a document, the movie clip Timeline is nested inside the main Timeline of the document. You can also nest a movie clip within another movie clip. See Nested movie clips.

You can use ActionScript to send a message from one Timeline to another. You must use a target path to specify the location of the Timeline you are sending the message to. See Using absolute and relative target paths.