Adobe After Effects CS4 Manual de usuario Pagina 257

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USING AFTER EFFECTS CS4
Animation and keyframes
Last updated 12/21/2009
Dragging the keyframe down slows down the layer.
To slow the layer down, drag the keyframe down. (If the layer is playing in reverse, drag up.)
To speed the layer up, drag the keyframe up. (If the layer is playing in reverse, drag down.)
To play frames backward, drag the keyframe down to a value below the previous keyframe value.
To play frames forward, drag the keyframe up to a value above the previous keyframe value.
To freeze the previous keyframe, drag the current keyframe marker to a value equal to the previous keyframe value
so that the graph line is flat. Another method is to select the keyframe and choose Animation
> Toggle Hold
Keyframe, and then add another keyframe where you want the motion to start again.
Before you move a time-remap keyframe, it’s a good idea to select all subsequent time-remap keyframes in the layer
first. This selection will preserve the timing of the rest of the layer when you remap time for the current keyframe.
Remap time in a Layer panel
1 Open the Layer panel for the layer you want to remap.
2 Choose Layer > Time > Enable Time Remapping. A second time ruler appears in the Layer panel above the default
time ruler and the navigator bar.
3 On the lower time ruler, move the current-time indicator to the first frame where you want the change to occur.
4 On the upper time ruler, the remap-time marker indicates the frame currently mapped to the time indicated on the
lower time ruler. To display a different frame at the time indicated on the lower time ruler, move the remap-time
marker accordingly.
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