Adobe After Effects CS3 - Manual (Page 215)

AFTER EFFECTS CS3
User Guide
210
Modifying a Bezier direction handle
See also
“Work with the Graph Editor” on page 184
“About animation, keyframes, and expressions” on page 183
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
.
Speed graph controls
A. Value at the current-time indicator B. Speed graph C. Direction handle (controls speed)
See also
“Work with the Graph Editor” on page 184
“About animation, keyframes, and expressions” on page 183
About changes in speed
When you animate a property in the Graph Editor, you can view and adjust the rate of change of the property in the
speed graph, or on the motion path in the Composition or Layer panel. As you adjust the rate in one panel, you can
view the changes in the other. In the speed graph, changes in the graph height indicate changes in speed. Level values
indicate constant speed; higher values indicate increased speed.
In the Composition or Layer panel, the spacing between dots in a motion path indicates speed. Each dot represents
a frame, based on the frame rate of the composition. Even spacing indicates a constant speed, and wider spacing
indicates a higher speed. Keyframes using Hold interpolation display no dots because there is no intermediate
transition between keyframe values; the layer simply appears at the next keyframe’s position.
A B C