Apple Motion 4 - Manual (Page 1098)

Locking Control Points
You can lock individual control points in a shape to fix them in place and prevent them
from being accidentally adjusted. A shape with locked points can still be moved. Locking
a control point simply prevents it from being adjusted while you edit a shape using the
Adjust Control Points tool.
To lock and unlock points
1 Choose the Adjust Control Points tool, then select a shape.
2 Control-click a control point, then choose Lock Point from the shortcut menu.
If the point was unlocked, it becomes locked. If the point was locked, Unlock Point appears
in the shortcut menu, and the point becomes unlocked.
Locked points appear with small
dashes on either side of the point.
Editing Bezier Control Points
The methods used to adjust Bezier shapes are similar to those used by many other
applications. Bezier control points are widely used to modify curves, and allow you to
easily draw any shape you may need.
Each point in a Bezier shape can be converted from a hard corner to a curve.
Curve Corner
1098 Chapter 17 Using Shapes, Masks, and Paint Strokes