Keyframing and Interpolation
 
 
 

When you keyframe, you determine what an object looks like at specific points in time, while algorithms fill the frames in between the keyframes. This technique is called in-betweening. The intermediate values between the keyframes are computed by interpolation.

Extrapolation is used to determine the behavior of a channel before the first or after the last keyframe—see Modifying Interpolation.