Keyframes are often used for things like animation, fades, and effects. But most users don’t understand them. Here we’ll explore a couple of the major methods keyframes interpolate (or blend) from one to another.
The default method of keyframe interpolation is Linear. This method creates a uniform rate of change between keyframes. It often looks a bit mechanical because the software calculates in-between values or each keyframe pair while the other keyframes in use in the Timeline are ignored. When using linear keyframes, changes begin instantly at the first keyframe and continue to the next keyframe at a constant speed. At the second keyframe, the rate of change switches instantly to the rate between it and the third keyframe.