User`s guide

Chapter 5 Animation
224
Working with Interpolation Types
Interpolation types determine how parameter values animate between keyframes. For
example, using Linear interpolation changes the parameter values in even increments over
time. Using the Accelerate interpolation type changes the parameter values in small
increments at the start of the effect and in gradually larger increments as the effect
progresses. Therefore, the Accelerate interpolation creates the impression that the effect is
accelerating over time. For detailed information on interpolation types, see “Interpolation
Menu” on page 236.
Changing Interpolation Types
By default, the interpolation type is the last type selected, but you can change this at any
keyframe. You can change a parameter’s interpolation type in either the Controls or Timeline
windows. When you change the interpolation in one window, the corresponding window
updates.
To change a parameter’s interpolation type in the Controls window:
t Click the Interpolation Field next to a parameter and select an interpolation type.
The change is applied to the selected keyframe in the timeline. If a keyframe is not
selected, a new one is created on the parameter’s track.
To switch between the default and Constant interpolations, do one of the following:
• Use the Animate button to switch between the default interpolation and Constant
interpolation.
• Press Alt+click the interpolation field in the Controls window to switch between the
Default and Toggle interpolation settings.
Working with the Animate button
The Animate button in the lower part of the Controls window lets you quickly switch
between Constant and default interpolation. This is useful for compositing rather than
animating an effect. You can change the default interpolation to Constant by clicking this
button. To switch back to the default interpolation, reclick this button.
Animate button in
Constant Interpolation
Animate button in
default interpolation