Comparing Motion Paths and Mask Paths

As suggested in Chapter 9, mask paths have a lot in common with motion paths. Although mask paths define shapes and not movement, editing a motion path is nearly identical to changing the shape of an open drawing path. Comparing the terminology used to describe each kind of path helps to reveal their similarities.

Table 13.1. Comparing Path Terminology

Mask Path	Analogous Motion Path
Mask Path control	Motion Path control
Control point	Keyframe
Anchor point	Linear Interpolation
Smooth point	Auto Bézier or continuous
	Bézier interpolation
Corner point	Bézier interpolation