Apple Motion 4 - Manual (Page 1287)

When Good Tracks Go Bad
Once an analysis is complete, you may need to retrack a portion of the clip. Rather than
tracking over bad tracking keyframes, it is recommended that you delete any bad
keyframes prior to retracking. If “bad” keyframes are not deleted, the tracker may continue
to use the old reference point.
Deleting Bad Keyframes in the Keyframe Editor
You can delete bad tracking keyframes in the Keyframe Editor.
To delete bad tracking keyframes
1 Position the playhead at the frame in which you want to reset the reference pattern.
2 In the Keyframe Editor, drag to select the keyframes you want to delete.
3 Control-click in the Keyframe Editor, then choose Cut from the shortcut menu (or press
Delete).
4 In the Canvas, drag the tracker to the reference point, then click Analyze.
New track keyframes are created.
1287 Chapter 19 Motion Tracking