Scale Content When Changing the Stage Size
This next new feature is one of my favorites. If you’ve ever found yourself creating different sizes of banners, or you had a correction in the stage size late in the game, you’ve felt the pain of trying to resize the stage. In previous versions of Flash, resizing the stage usually meant manually resizing the content on the stage after the fact. In Flash CS5.5, you can choose to resize the content when the stage is resized. When you edit the Document Properties, you can now change the dimensions of the stage, select Scale Content with Stage, then click OK to scale both (see Figure 2).
Figure 2 Scale content when changing the stage size