Adobe Premiere Pro CS4 - Manual (Page 413)

407 USING ADOBE PREMIERE PRO CS4
Animation
Last updated 11/6/2011
Note: In a Value or Velocity graph, you cannot move a keyframe left or right to change its current time. Instead, drag a
keyframe marker above the graph using the Selection or Pen tool.
Edit keyframe graphs from a Timeline panel
1 Make sure a Timeline panel has at least one clip containing one or more effects with keyframes. Select this clip and
select the Effect Controls panel.
2 Make sure that the keyframes for the clip or track are visible in a Timeline panel.
3 In the Effect Controls panel, click the triangle next to the control you want to adjust to expose its Value and Velocity
graphs.
4 In the effect menu that appears after the name of the clip or track, select the property you want to adjust. If you can’t
see the effect menu, try increasing the magnification of a Timeline panel.
5 Use the Selection or Pen tool to do one of the following:
• If you want to edit multiple or nonadjacent keyframes, select those keyframes.
• Position the Selection or Pen tool over a keyframe or keyframe segment. The Selection or Pen tool changes to the
keyframe pointer
or keyframe segment pointer .
6 Do any combination of the following:
• Drag a keyframe or segment up or down to change the value. As you drag, a tool tip indicates the current value. If
no keyframes are present, dragging adjusts the value for the entire clip or track.
• Drag a keyframe left or right to change the time location of the keyframe. As you drag, a tool tip indicates the
current time. If you move a keyframe onto another keyframe, the new keyframe replaces the old one.
The Value and Velocity graphs in the Effect Controls panel will show changes made to keyframes in a Timeline panel.
Editing keyframe values in a Timeline panel
You can use the Selection and Pen tools to edit keyframes in a Timeline panel. You increase or decrease values by
dragging keyframes vertically. When working with keyframes graphically in a Timeline panel, be aware of how the
values and units of specific properties are represented along the vertical axis of the time graph, as in the following
examples:
• Opacity is measured from 0% at the bottom of the scale to 100% at the top of the scale, and the center of the graph
is 50%.
• Rotation is measured in rotations and degrees, and the center of the graph represents no rotation (0°). Clockwise
rotation values are above the center, and counterclockwise values are below the center.
• Audio balance is measured from –100 to 100, with 0 at the center (neutral balance). Dragging above the center
moves balance toward the left channel and sets a negative value, and dragging below the center moves balance
toward the right channel and sets a positive value.
Optimize keyframe automation
Automating audio changes in the Audio Mixer can create more keyframes than necessary in the audio track, causing
a degradation in performance. To avoid creating unnecessary keyframes, thereby ensuring both quality interpretation
and minimal performance degradation, set the Automation Keyframe Optimization preference. In addition to the
other benefits, you can edit individual keyframes much easier if they are assembled less densely in the track.
1 Choose Edit > Preferences > Audio (Windows) or Premiere Pro > Preferences > Audio (Mac OS).