Specifications

Chapter 4 Production 71
A corner is represented by a diamond-shaped tween point. A sequence of
corner points causes the value to change gradually, and linearly, between the
points. Often, this is the desired behavior, particularly when controlling opacity
or volume.
A smooth point is represented by a round tween point, and is added by
Control-clicking. It acts as a pin attached to the curve by a rubber band. When
you move the smooth point away from the curve, the rubber band stretches,
causing the curve to bend.
Editing Tween Points Numerically To edit a tween point numerically, double-click to open its dialog box. See the
description of each type of tween track under “Tween Tracks” on page 179 for
more details.
External Control of Tween Tracks Tween tracks can also be controlled by external inputs. Those are indicated by
a round formula button under the title of the tween track. See “Controlling
Tween Tracks” on page 202 for more details.
Add a corner point by clicking the
curve.
Add a smooth tween point by
Control-clicking.