Flash CS4 Tutorial
How to Add Drop Shadow to Movie Symbol, Text or Button using the Flash Drop Shadow Filter
Drop shadows add depth to your designs. They provide clues about the light direction and distance between objects and the background.
Add a rectangular object to the workspace with the Rectangle tool (r key).
Select the rectangle and convert it to a Movie Symbol (Modify > Convert to Symbol (F8)).
With the rectangle Movie Symbol still selected, open the Filters panel by clicking the Filters tab (Window > Properties > Filters).
Add a filter to the Filter panel by clicking the Add Filter icon and selecting Drop Shadow from the pull-down menu.
In the dialog box adjust the Blur to soften the edges. The Color box allows you to change the shadow color.
The default Strength setting of 100% is usually too high. Scrub the current value to change the setting.
Quality choices include Low, Medium, and High.
Angle and Distance can also be set.
The Knockout, Inner Shadow, and Hide Object checkboxes provide additional options.