Apple Motion 4 - Manual (Page 559)

In the Keyframe Editor you can add and delete keyframes, as well as move them in
two-dimensional space to modify their values (up-down) and their positions in time
(left-right). You can also directly manipulate the curves themselves with the tools Motion
provides. Furthermore, you can define a variety of interpolation methods, creating
dramatically different types of effects. You can also apply Parameter behaviors directly
to curves in the Keyframe Editor by Control-clicking the curve name and choosing a
Parameter behavior from the shortcut menu. For more information about Parameter
behaviors, see
Parameter Behaviors .
For example, in the real world, when objects move, they observe rules of physics, such
as inertia and momentum. Motion’s Keyframe Editor allows you to simulate these sorts
of effects in your motion graphics.
Check Your Selection
The parameters that are available in the Keyframe Editor depend on which objects are
selected in the other windows. If you select one item in the Layers tab, Canvas, or
Timeline, only parameters for that object are accessible in the Keyframe Editor.
If you want to compare curves from parameters across multiple objects (for example to
make two separate objects begin fading in at the same time), you must select both
items in the Layers tab, Canvas, or Timeline. Then parameters for both objects are listed
in the Keyframe Editor.
Additionally, you can modify curves on an group if it is selected instead of the objects
within it. In this way, you can view or modify keyframe activity that affects all of the
objects within the group.
To display the Keyframe Editor
Do one of the following:
µ
If the Timing pane is already visible, click the Keyframe Editor tab in the Timing pane.
µ
Choose Window > Keyframe Editor.
µ
Press Command-8.
559 Chapter 10 Keyframes and Curves