Adobe After Effects CS3 Manual de usuario Pagina 223

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AFTER EFFECTS CS3
User Guide
218
Click the Easy Ease , Easy Ease In , or Easy Ease Out button located at the bottom of the Graph Editor.
Use Exponential Scale
You can simulate a realistic acceleration of a zoom lens when working with 2D layers by using Exponential Scale,
which converts linear scaling of a layer to exponential scaling. This is useful for creating a cosmic zoom, for example.
Zooming optically with a lens is not linear—the rate of change of scaling increases as you zoom. To simulate this
acceleration, Exponential Scale converts the velocity of the scaling to an exponential curve.
1 In layer bar mode or in the Graph Editor, hold down the Shift key and select starting and ending keyframes for
the scale property.
2 Choose Animation > Keyframe Assistant > Exponential Scale.
Note: Exponential Scale replaces any existing keyframes between the selected starting and ending keyframes.
Time-stretching and time-remapping
Time-stretch a layer
Speeding up or slowing down a layer is known as time-stretching. When you time-stretch a layer, the audio or the
original frames in the footage (and all keyframes that belong to the layer) are redistributed along the new duration.
Use this command only when you want the layer and all layer keyframes to change to the new duration.
Time-stretching a layer redistributes keyframes along the new duration.
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