The Track behavior, a member of the Parameter behavior subcategory, allows you to match the position parameters of shapes, clips, or filters (such as the Center parameter of a Circle Blur filter) to a reference feature of a clip.
The tracking data is obtained in one of two ways:
After you add the Track behavior to a position parameter, another clip is analyzed in the Track behavior, and the recorded data is applied to that position parameter.
Tracking data from another tracking behavior is referenced by the Track behavior. The recorded data from the referenced behavior is applied to the position parameter.
Note: Although it’s a Parameter behavior, the Track behavior is only designed for use with position parameters.