Track View Pick Dialog
 
 
 
Command entry:Select a Crowd helper. Modify panel Global Clip Controllers rollout New Choose a GlobalClip object. Select the object in the list. Edit Synthesis dialog Motion Clips panel Track View group New Track View Pick dialog
Command entry:Track View Hierarchy Global Tracks Block Control Global Clip Properties (right-click) Synthesis dialog Motion Clips panel Track View group New Track View Pick dialog

Open the hierarchy and pick a track to use in the motion clip.