Constraint clips
 
 
 

You create constraints clips to schedule a constraint, turning on and off at specific points in time. For example, a baseball can be constrained to Surfer and Rufus in turn, at different points in time, because of a series of constraint clips. The baseball is not constrained to Surfer’s hand until he touches it, and the ball follows his hand until he throws it.

The baseball is constrained to Surfer’s hand for a specific moment in time. When Surfer throws the ball, the constraint is turned off and the ball is no longer constrained to his hand.

NoteA Constraint track must be placed below the track containing the animation that the constraint is meant to affect. To move a track, click on its name and drag it up or down to the desired location.

See Creating constraints clips.