Apple Motion 4 - Manual (Page 1258)

As you drag the tracker in the Canvas, the region around the tracker becomes magnified
to help you find a suitable reference pattern.
The foreground element is the particle emitter
(emitting red flowers). As you drag the track point in the Canvas, the
area around the tracker becomes magnified.
6 Click the Analyze button in the HUD or Behaviors tab of the Inspector.
The foreground element is tracked to the background element.
7 If you are using two-point tracking, turn on (or off ) the Position, Scale, or Rotation buttons
(in the Adjust row) to add (or remove) tracking parameters.
In the following example, only Position is enabled in the Adjust row of the Behaviors tab.
As a result, although the camera pushes in toward the picture frames, the white elliptical
shape does not change its scale or rotation based on the position of the two trackers.
1258 Chapter 19 Motion Tracking