The following methods are associated with the Trackbar:
Gets the previous key time. If no previous key is present, returns undefined.
Gets the next key time. If no next key is present, returns undefined.
The following 3ds Max System Global Variables are associated with the Trackbar:
Get and set the filter specifying which types of keys to show in the Trackbar.
The valid values are: #all, #TMOnly, #currentTM, #object and #mat.
Get and set whether the trackbar is visible - true if the trackbar is visible, false if invisible