The Assign Controller rollout assigns and appends different transform controllers to individual objects. You can also assign controllers in Track View. Animation controllers are plug-ins that handle all of the animation tasks in 3ds Max. For a complete list of available Animation controllers, see Animation Controllers.
Displays a selectable list of controllers for a selected track.
Once controllers have been added, right-click the Biped SubAnim entry in the list and choose Properties to display the SubAnims dialog.
Position List When turned on, selects the Position controller to be collapsed into the Biped SubAnim track.
Rotation List When turned on, selects the Rotation controller to be collapsed into the Biped SubAnim track.
Scale List When turned on, selects the Scale controller to be collapsed into the Biped SubAnim track.
Position Collapses the Position controller when you click Collapse.
Rotation Collapses the Rotation controller when you click Collapse.
Don't Delete Prevents the removal of the list controller after collapsing and hides the controller instead.
Per Frame Creates a key per frame during the collapse, preventing the controller from collapsing onto the key times of the biped and SubAnim controller.