Apple Motion 4 - Manual (Page 558)

You can prevent this automatic resizing by pressing Command while resizing an effect
object. This changes the overall duration of the effect, but does not alter the speed at
which the effect changes as determined by the keyframes.
Pressing Command while you resize an object with effects applied trims the object without
trimming the effects. This works the same way as trimming a group without modifying
the durations of the component elements.
Animating in the Keyframe Editor
Whenever you create two or more keyframes, Motion generates interpolated values for
the frames that come between. These are called curves. The Keyframe Editor is the control
that allows you to view and make modifications to those curves. This feature provides
one of the most sophisticated and powerful ways to modify the objects and effects in
your project.
Viewing the curves for your animated parameters gives you another way to understand
how your effect is changing over time. The curves are laid out over a graph where you
can compare the curves of different parameters. As you get more familiar with “reading”
the graphs, you will learn how and why certain effects feel organic or synthetic.
558 Chapter 10 Keyframes and Curves