True

Two sets of three button

Timeline

It`s own individual layer

All

Document level undo makes Flash animation an undo list for the whole document whereas an object level undo makes Flash keep a separate undo for each object

Document level undo will undo the things you did in the order you did them but object level undo will only undo the things you did to the current timeline

To make objects fade in and fade out of movies

To create window in objects

Lines,Strokes

All

Edit-->Undo

Ctrl+Z