How do I change the size of other scenes in macromedia flash professional 8?

When I try to change the size of scene 2, the size also changes in scene 1.How do I change the size of other scenes in macromedia flash professional 8?
Try this:


鈥?Set your canvas to the biggest size you want to use.


鈥?In other scenes with smaller size, create a layer in the top of other layers, draw a rectangle with a size smaller than the canvas, and make this top layer as a mask for the other layers.How do I change the size of other scenes in macromedia flash professional 8?
the whole thing has to be the exact same size. Sorry.