Flash Animation 22: Flash for Web Design: GUI Design

Now comes switching out the Up state and the Over state (make sure you're on the Over frame before doing this). Since we're using bitmap graphics we can make use of a useful function: the Swap Bitmap function. Right-click on the graphic, select Swap Bitmap, and then choose the rollover state from the list presented.

Once that's done, either copy the Over state to the Down and Hit states, or else repeat this for the Down state if you have yet a third graphic change.