Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 219

• The interpolation type applied for a keyframe. For example, it is difficult to make a value change smoothly through
a keyframe when the keyframe is set to Linear interpolation, but you can switch to Bezier interpolation at any time,
which provides a smooth change through a keyframe. If you use Bezier interpolation, you can adjust the rate of
change even more precisely using direction handles.
Linear interpolation (top) causes sharp changes; Bezier interpolation (bottom) creates smoother changes.
See also
"Work with the Graph Editor" on page 186
"About animation, keyframes, and expressions" on page 185
Control speed between keyframes
• In the Composition or Layer panel, adjust the spatial distance between two keyframes on the motion path.
Increase speed by moving one keyframe position farther away from the other, or decrease speed by moving one
keyframe position closer to the other.
More spatial distance between keyframes increases layer speed.
AFTER EFFECTS CS3 213
User Guide