Adobe AFTER EFFECTS 5.5 Help Manual page 134

Adobe After Effects Help
Using Help | Contents
In the Timeline window, adjust the time difference between two keyframes. Decrease
•
speed by moving one keyframe farther away from the other, or increase speed by
moving one keyframe closer to the other.
Shorter temporal distance between keyframes increases layer speed.
Apply the Easy Ease keyframe assistant, which automatically adjusts the speed of
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change as motion advances toward and retreats from a keyframe. See "Automatically
easing speed using the Easy Ease keyframe assistant" on page 139.
Fine-tuning speed
Using the Speed or Velocity graph, you can adjust motion or the rate of change for a value
so that it occurs more slowly just before or just after a keyframe, or so that a layer moves
quickly over a certain distance and then slows down smoothly. By adjusting the rise and
fall of the graph, you can control how fast or slow a value changes from keyframe to
keyframe. Each temporal interpolation method affects acceleration and deceleration
differently. If you don't get the results you want, try a different temporal interpolation
method.
When adjusting speed on a motion path, set the shape of a motion path first, and then use
ease handles to fine-tune the speed relationships in the Speed graph. Ease handles
provide the most direct control over acceleration and deceleration. You can control the
values approaching or leaving a keyframe together or separately. The incoming handle
increases the influence of a keyframe value on the previous keyframe when you drag it to
the left, and decreases the influence on the previous keyframe when you drag it to the
right. It increases or decreases the speed when you drag it up or down. The outgoing
handle influences the next keyframe in the same way.
Note: If you want a handle to have influence over more than one keyframe, use roving
keyframes. See "Creating smooth changes using roving keyframes" on page 137.
To fine-tune speed between keyframes:
1 In the Timeline window, expand the outline for the keyframe you want to adjust. Then
click the triangle to the left of the property to display the Speed graph or the Velocity
graph.
2 At the keyframe you want to adjust, drag either ease handle up to accelerate, or down
to decelerate, entering and leaving the keyframe.
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Fine-tuning Animation
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