Apple Motion 4 - Manual (Page 319)

Editing Opacity and Blending Parameters
The opacity and blending controls for each object appear both in the Properties tab of
the Inspector, and in the default HUD for any selected object.
Opacity
By layering together objects with varying opacities, you can merge them together in ways
not otherwise possible. For example, if you have two full-screen background images that
you want to use together, you can set the opacity of the object in front to 50%, allowing
the object in back to show through.
Image in front Image in back Front image at 50% opacity
You can overlap as many objects as you want, and by varying their opacities, selectively
reveal objects in the back.
To change an object’s opacity
Do one of the following:
µ
Adjust the Opacity slider in the Properties tab.
µ
Adjust the Opacity slider in the HUD.
Note: Some objects, such as text and shapes, have additional opacity parameters in their
respective tabs in the Inspector. For example, setting a shape’s Opacity value in the
Properties tab and setting its Opacity value in the Style pane are separate controls that
have multiplicative effects. In other words, if Opacity is set to 50% in the Properties tab,
then set to 50% in the Shape Style pane, the result opacity for the text is 25%.
319 Chapter 7 Basic Compositing