Modifying Interpolation

Adding and Deleting Keyframes			Modifying Extrapolation
Chapter 21, Animation

Once you create keyframes for a channel, you can use interpolation to determine the channel values for the in-between frames. The appearance of the animation in the Curve Editor depends on the interpolation method used. In the Curve Editor, the interpolation method is represented by the shape of the curve that joins the keyframes. You can set the interpolation for an entire curve or for individual keyframes.

The following interpolation methods are supported:

Constant (key values do not change in time between keys, tangents are absent)
Linear (straight interpolation between keys, tangents are absent)
Bezier (spline interpolation, you can edit the tangent length and orientation)

Bezier

Linear

Constant

Note: The default interpolation setting is Bezier.

To set the interpolation method for an individual keyframe or an entire curve using the Animation tab Property area or the Curve or Track Editor view controls:

Select the keyframe(s) for which you want to change the interpolation.
Select Interpolation and select the interpolation method.