Apple Final Cut Pro 6 - Manual (Page 1175)

390 Part II Effects
Adjusting Opacity Levels of Clips
Every video clip has an Opacity parameter that allows you to change the clip’s level of
transparency. When you adjust the opacity level of one or more clips, they blend to
create a single image. You can then use the resulting image as the background for
another layer, such as a text or graphics layer.
There are two ways you can adjust a clip’s opacity:
 Drag the opacity overlay of a clip in the Timeline.
 Open the clip in the Viewer and specify the Opacity parameter’s value in the Motion tab.
The Opacity parameter in the Motion tab and the opacity overlay displayed in the
Timeline have identical settings. A change made to one is mirrored in the other.
When you blend multiple clips together using the Opacity parameter, it’s important to
be aware of the color range, the amount of movement, and the overall amount of
contrast and texture in the images with which you’re working. Balancing all of these
qualities is what separates a good-looking composite from a confused jumble of
images and motion.
Opacity is used to blend
two clips.