WeΓÇÖre almost done... How about making a small screen to show the track selected by the user?
Select the Text tool. Activate the Text Field button to make a text field that will display the variable. Create a text area on the main timeline under the user interface (the five buttons that you created earlier). To edit the properties of this text box bring up the Text Options panel.
In the Variable field, type current. Untick Selectable and tick Border\Bg.
Our track switcher is ready. You can export this .swf or just test it. Enjoy!
