The Perform track is only grouped in the sub-track set for Actors and iProps. It stores the motion/animation clips as the actors or props perform specific motions/animations. You may command these two objects in Director Mode or Editor Mode.
In the Director Mode, you may command your actors or props to Perform via the Right-click Menu or Hotkeys during the recording process. Once the performing process is done, the motion during the recording will be stored right onto the Perform track.
Toggle the Director Mode by clicking the button if you are in the Editor Mode.
Make sure that you have selected the desired actor or iProp.
You may have your object perform in two methods as it is recording:
Use 1234... hotkeys to command the selected object to perform the predefined motions/animations. (If it is not recording, press Space Bar to start recording)
(The amount of the hotkeys depends on how many sub-commands are listed under the Perform entry of an object's Right-click Menu.)
Alternatively, you may right-click on the 3D viewer to pop up the Right-click Menu. Select any sub-command in the Perform entry.
The motion/animation clip will be stored into the Perform track instantly as the perform process finishes.
In the Editor Mode, you may also add motion/animation clips into the Perform track. However, you can only achieve this goal by using the Right-click Menu.
In the Editor Mode, right click on the actor/iProp perform actions.
Select any sub-command in the Perform entry.
The motion/animation clip will be stored into the Perform track instantly.