Apple Motion 4 - Manual (Page 1152)

The shape’s control points appear in the Canvas. In this example, the selected shape is
the lower lip of the mouth illustration.
2 Enable Record (press A).
Record button
3 Move to the frame where you want to change the shape, then make any necessary
changes to the shape’s control points.
In the Keyframe Editor (and also in the Timeline, if the Show/Hide Keyframes button is
turned on), a keyframe appears for each adjustment you make at a new frame.
Note: Adjusting a shape while the playhead is on an already existing keyframe adjusts
the shape at that keyframe.
4 Continue advancing frames and making changes as needed.
1152 Chapter 17 Using Shapes, Masks, and Paint Strokes