Speed - Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual

Modify Bezier direction handles
In the Graph Editor, keyframes that use Bezier interpolation have direction handles attached to them. You can
retract, extend, or rotate the direction handles to fine-tune the Bezier interpolation curve.
Retracting a direction handle makes a tighter, sharper Bezier curve. Extending a direction handle makes a larger,
smoother Bezier curve. By default, when you retract or extend a direction handle, the opposite handle on the
keyframe moves with it. Splitting direction handles makes the two direction handles attached to a keyframe behave
independently.
• To retract or extend direction handles, drag the direction handle toward or away from the center of its keyframe
with the Selection tool.
• To split direction handles, Alt-drag (Windows) or Option-drag (Mac OS) a keyframe with the Selection tool. You
can also Alt-drag (Windows) or Option-drag (Mac OS) outside a keyframe to draw new handles, whether or not
there are existing handles.
• To manipulate the direction handles of two neighboring keyframes simultaneously, drag the value graph segment
between the keyframes.
Modifying a Bezier direction handle
See also
"Work with the Graph Editor" on page 186
"About animation, keyframes, and expressions" on page 185

Speed

About speed graphs
You can fine-tune changes over time using the speed graph in the Graph Editor. The speed graph provides infor-
mation about and control of the value and rate of change for all spatial and temporal values at any frame in a compo-
sition. To view the speed graph, choose Edit Speed Graph from the Choose Graph Type menu
A
Speed graph controls
A. Value at the current-time indicator B. Speed graph C. Direction handle (controls speed)
B C
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User Guide
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