Instruction Manual

Chapter 12 Keyframing 448
Keyframes at the beginning and end of the curve
When you begin adding keyframes, you instruct Motion to modify the in-between frames to
interpolate the eect. But what values are used for the frames before the rst keyframe and after
the last one?
By default, when you add your rst keyframe, that same value is extended forward and backward
to the beginning and end of the clip (as if you hadn’t added a keyframe). After you add a second
keyframe, the eect begins to change over time. The frames before that rst keyframe remain
at the value of that rst keyframe. Similarly, the frames after the last keyframe hold at that last
dened value.
You can override this default behavior to create loops and other patterns by using the Before
First Keyframe and After Last Keyframe submenus as described in the Set curve extrapolation on
page 478 section later in this chapter.
Animate via the Inspector
Animate parameters in the Inspector
Although you can animate many attributes using the HUD, many other parameters are accessible
only in the Inspector. Each section of the Inspector contains keyframeable parameters. For
example, you can animate the position and shape of a mask, the color and styles of a text object,
or the options in the generators. The parameters that are keyframeable depend on which object
is selected and which eects are applied to that object.
Animate parameters in the Inspector using the Record button
1 In the Canvas, select the object to keyframe.
2 Click the Record button (or press A) to turn on keyframe recording.
3 Place the playhead on the frame where you want the eect to begin.
4 Open the Inspector pane corresponding to the parameter you want to modify (Filters, in this
example).
Note: When the Record button is turned on, animatable parameter values appear red. When the
Record button is o, parameter values that have no keyframes remain a light shade of gray.
5 Set the parameter to the beginning value.
6 Move the playhead to a new position.
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