Flash 5 Drag Mask Tutorial - Page 2

First rename layer one of the main stage to be called “navigation” create a new movie clip called “navigation” give it the instance name of “navigation” as well or something similar. Rename layer one of this movie clip to be called “background”.

Create two pictures (I find that two pictures the same but one in black & white the other in colour works best but experiment to see what works best for you.)

On the layer called “background” place a new movie clip called “background picture”, import the black & white picture to layer one of this movie clip. This is the picture that the user will see when the mask is not passing over it. You can now lock this layer for now.