The nifty nine-slice scaling guides, which you set in Illustrator but that only take effect in Flash, allow you to determine how objects behave when scaled. Here, the symbol on the left has nine-slice scaling disabled, the one in the middle preserves the entire "4" when scaled, and the rightmost one preserves the counter (the hole in the middle of a letter). Their corresponding results in Flash, when scaled preserving the aspect ratio, are displayed below. Unfortunately, you can't preview the results in Illustrator.