MACROMEDIA FLEX - DEVELOPING COMPONENTS AND THEMES Manual page 14

To edit symbol layers:
Enter Edit Symbols mode.
1.
Rename an empty layer, or create a layer called main. You can use any name for the main layer;
2.
however, this document refers to this layer as the main layer.
In the first frame of the main layer, add a
3.
figure shows:
Do not add any graphical assets to this layer.
Rename an empty layer, or create a layer called assets. You can use any name for the assets layer;
4.
however, this document refers to this layer as the assets layer.
The assets layer includes all the graphical assets used by this component.
Insert a blank Keyframe on the assets layer. You should now have two frames on the assets layer.
5.
Add any graphical assets used by this component on the second frame of your component's
6.
assets layer. For example, if you are creating a custom button, add the graphics that represent
the button's states (up, down, and so on).
Drag dependent components onto the Stage of the component symbol's assets layer, if
7.
necessary. For more information, see
When you have finished creating the symbol content, do one of the following to return to
8.
document-editing mode:
Click the Back button at the left side of the edit bar above the Stage.
Select Edit > Edit Document.
Click the scene name in the edit bar above the Stage.
14 Chapter 1: Working with Flash MX 2004
action in the Actions panel, as the following
stop()
"Adding dependent components" on page 15.