Apple Final Cut Pro 6 - Manual (Page 1075)

290 Part II Effects
Using Three Keyframes
With three keyframes, you can create more complex effects, such as a curved motion
path. In the example below, the position of the clip starts at the location specified by
the first keyframe, moves to the position specified by the second keyframe, and then
continues on its journey until it reaches the position specified by the third keyframe.
(For more information about creating motion paths in the Canvas, see “
Creating
Keyframed Motion Paths in the Canvas ” on page 311.)
Using Four or More Keyframes for Complex Effects
You can make isolated changes to sections of an overlay for an effect if you have at
least four keyframes. For example, if you have a superimposed clip that’s set at
50 percent opacity for the duration of the clip, but you need it to go to 100 percent
for 3 seconds right in the middle, you can create four keyframes on that clip’s opacity
overlay. Now you can have the opacity level of the clip start at 50 percent, jump to
100 percent for the duration the keyframes specify, and then drop back to 50 percent
for the remaining duration of the clip.
Keyframe 2
Keyframe 1
Keyframe 3
Using four keyframes, you can
isolate changes to specific
sections of a clip’s overlay.