How to enlarge size of Flash animation? (NOT completed)

1. Unlock those layers which you want to enlarge the size of. (Lock those which you want to keep the size of.)
2. Move the play head in Timeline to about the centre of the timeline frames.
3. Click the 'two dark square' icon under the timeline. That icon means 'Edit Multiple Frames'.
4. Drag the left bracket to Frame 1, and the right bracket to