MACROMEDIA FLASH 8-USING FLASH Use Manual page 269

To mask additional layers after creating a mask layer, do one of the following:
Drag an existing layer directly below the mask layer.
Create a new layer anywhere below the mask layer.
Select Modify > Timeline > Layer Properties and select Masked in the Layer Properties
dialog box.
To unlink layers from a mask layer:
1. Select the layer you want to unlink.
2.
Do one of the following:
Drag the layer above the mask layer.
Select Modify > Timeline > Layer Properties and select Normal.
To animate a filled shape, type object, or graphic symbol instance on a mask
layer:
1.
Select the mask layer in the Timeline.
2.
Click in the Lock column to unlock the mask layer.
3.
Do one of the following:
If the mask object is a filled shape, apply shape tweening to the object as described in
"Tweening shapes" on page
If the mask object is a type object or graphic symbol instance, apply motion tweening
to the object as described in
4. When you've completed the animation operation, click in the Lock column for the mask
layer to lock the layer again.
To animate a movie clip on a mask layer:
1.
Select the mask layer in the Timeline.
2.
Double-click the movie clip on the Stage to edit the movie clip in place and to display the
movie clip's Timeline.
3.
Apply motion tweening to the movie clip as described in
type" on page 253. To animate the movie clip on a motion path, see
along a path" on page
4. When you've completed the animation procedure, click the Back button in the Edit in
Place window to return to document-editing mode.
5. Click in the Lock column for the mask layer to lock the layer again.
261.
"Tweening instances, groups, and type" on page
257.
"Tweening instances, groups, and
"Tweening motion
Using mask layers
253.
269