Adobe After Effects CS4 Manual de usuario descargar pdf (Pagina 223)

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USING AFTER EFFECTS CS4

Animation and keyframes

Last updated 12/21/2009

• RPF Camera Import Imports RPF camera data from third-party 3D modeling applications.

• Sequence Layers Opens the Sequence Layers assistant.

• Time-Reverse Keyframes Reverses selected keyframes in time.

More Help topics

“Keyframe interpolation” on page 231

“Expression basics” on page 646

Delete or disable keyframes

• To delete any number of keyframes, select them, and then press the Delete key.

• To delete one keyframe in the Graph Editor, Ctrl-click (Windows) or Command-click (Mac OS) a keyframe with

the Selection tool.

• To delete all keyframes for one layer property, click the stopwatch button to the left of the name of the layer

property to deactivate it.

When you click the stopwatch button to deactivate it, keyframes for that property are permanently removed and the

value of that property becomes the value at the current time. You cannot restore deleted keyframes by clicking the

stopwatch button again. Deleting all keyframes does not delete or disable expressions.

• To temporarily disable keyframes for a property, add an expression that sets the property to a constant value. For

example, you can add this very simple expression to the Opacity property to set it to 100%:

100.

Click the Enable Expression button to toggle the expression on and off, which toggles the keyframes off and on as a

side effect.

If you accidentally delete keyframes, choose Edit > Undo.

Jeff Almasol provides a script on his redefinery website that automatically removes keyframes based on specified

criteria—for example, all keyframes in the work area, all odd-numbered keyframes.

More Help topics

“About animation, keyframes, and expressions” on page 210

“The Graph Editor” on page 211

“Keyframes and the Graph Editor (keyboard shortcuts)” on page 751

“Showing properties and groups in the Timeline panel (keyboard shortcuts)” on page 748

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