How to change Flash presentation size and scale?

You can change the size and scale of your output presentation to make it fit your webpage design even smoother. To do so, just enter the dimensions that you need in the Advanced tab of the Publish window, and your Flash movie will adopt the size you want. If you are not sure about the pixel format you need, you can try to play with the scale, which would calculate the presentation size for you.

Keep in mind that changing the Flash movie dimensions will effect the output file size.