Apple Motion 5.1.1 - Manual (Page 456)

Chapter 12 Keyframing 456
Keyframes and effect duration
When you change the duration of an effect such as a filter or behavior in the Timeline, the
timing of all keyframes applied to that effect is scaled proportionally. This means that keyframed
changes to an effect speed up or slow down if the effect is shortened or lengthened. This
happens whether you change the duration of the effect object bar, or the duration of the image
object bar an effect is applied to.
Note: Object parameters such as Position, Rotation, Scale, Opacity, and so on are not affected.
If you press Command while resizing an object bar that has effects applied, the object bar is
trimmed without altering the timing of any keyframes. You can also prevent automatic keyframe
retiming by pressing Command while changing the duration of an effect object bar.
Keyframe Editor
Keyframe Editor overview
When you create two or more keyframes, Motion generates interpolated parameter values for
the frames that come between. These changing parameter values are represented by curves the
Keyframe Editor. Using the Keyframe Editor, you can view and modify these curves to animate
objects and effects in your project.
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