Adobe PREMIERE PRO 2, Руководство пользователя, Страница: 245 / 448

ADOBE PREMIERE PRO 2.0
User Guide
239
Specifying keyframe values in the Timeline panel
You can use the Selection and Pen tools to edit keyframes in the Timeline panel. You increase or decrease values by
dragging keyframes vertically. When working with keyframes graphically in the 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.
To edit keyframe graphs in the Timeline panel
1 Make sure the Timeline panel has at least one clip containing one or more effects with keyframes.
2
Make sure that the keyframes for the clip or track are visible.
3 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 the Timeline panel.
4 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 .
5
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.
See also
“To activate keyframing” on page 234
“To apply an effect to a clip” on page 253
“About the Timeline panel” on page 107
To 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 interpre-
tation 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.