To Create A Bounce Or Peak; To Start Or Stop Change Gradually - Adobe AFTER EFFECTS 7.0 Manual

To create a bounce or peak

Use direction handles to simulate the type of acceleration seen in a bouncing ball. When you create this type of effect,
the speed graph appears to rise quickly and peak.
1 In the Timeline panel, expand the outline for the keyframe you want to adjust.
Click the Graph Editor button and display the speed graph for the property.
2
Make sure the interpolation method for the keyframe you want to peak is set to Continuous Bezier or Bezier.
3
4 Drag the desired keyframe (with joined direction handles) up until it is near the top of the graph.
Drag the direction handles on either side of the keyframe toward the center of the keyframe.
5
Dragging direction handle to create a peak
See also
"Applying and changing interpolation methods" on page 222

To start or stop change gradually

Direction handles can create gradual starts and stops, such as a boat slowing to a stop and then starting again. When
you use this technique, the speed graph resembles a smooth U shape.
1 In the Timeline panel, expand the outline for the keyframe you want to adjust.
Click the Graph Editor button and display the speed graph for the property.
2
Make sure the interpolation method for the keyframe you want to adjust is set to Continuous Bezier or Bezier.
3
4 At the desired keyframe, drag the direction handle down until it is near the bottom of the graph.
Drag the direction handles on either side of the keyframe away from the center of the keyframe.
5
Dragging the direction handle to make a gradual change
See also
"Applying and changing interpolation methods" on page 222
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User Guide