Apple DVD Studio Pro 4 - Manual (Page 109)

Note: If you make the image mask layer (the first layer) of a shape the same size as the
shape’s graphics layer (the second layer), you may see some of the mask layer around
the edges of the graphics layer. This is because the shape’s graphics layer is processed
differently than the mask layer. You can work around this issue by making the mask
layer slightly smaller than the graphics layer.
• Second layer: Contains the shape’s visible graphic. When used as a button, this is the
layer that determines how the button looks in its normal state. DVD Studio Pro uses
the RGB values for the shape. See
Setting a Shape’s Opacity if you want this layer to
be partially transparent. Be sure to flatten any effects you apply to the layer. (See
Flattening a Photoshop Layer for details.) Because this layer has a higher priority than
the first layer, it must provide a “window” to the thumbnail mask (if used).
When you activate drop shadows on a button or drop zone using a shape,
DVD Studio Pro uses this layer, along with the first layer, to define the shape of the
drop shadow.
• Third layer: Contains the highlight mask. This layer defines where the highlight colors
appear when you use the shape as a button and the button is selected or activated.
The actual image color does not matter, because it is this layer’s opacity that defines
the highlight, with 100% opacity selecting the black highlight color and 0% selecting
the white highlight color.
This layer is ignored if you use the shape in a drop zone.
109 Chapter 6 Preparing Menu Assets