Pivot Point: Lets you change transform center.
Reference Coordinate System: Lets you change reference coordinate system.
Edit Keys: Activate edit keys mode, so you can edit key frame in trajectory.
On/Off: Shows or hides the trajectory for selected objects. By using this command you only see the trajectory and you cannot edit keys.
Off All: Because trajectory decreases viewport frame rate, use this command to turn all trajectories off.
Curve Editor: Opens Curve Editor dialog, so you can edit animation curves. This dialog is configured to show only animatable curves.
Selector: Creates selection set object based on selection. For load selection set, just hold down Ctrl Key and click on selector object.
Layer Animation: Opens layer animation dialog.
Color Correction: Opens Color Correction dialog. You can change hue, saturation, brightness, etc. for selection.
Ghosting: Turns Ghosting on or off.
Visibility: Changes visibility of selection. Note that you must render to see any changes to visibility.
Color: Lets you change wire color of selection.
Size: Lets you change size, radius, width or height of the selected controllers.
UTile and VTile: This spinners works on tile objects only, to increase or decrease tile amount.
Edit Sound: Opens Sound Editor, so you can import and change properties of sound clips.
Sound Toggle: Sound clip will be play at playback time if you toggle this button.
IK-FK: If you select IK-FK controller object in the scene, then you can change its value by using this spinner.
Squash-Stretch: If you select Squash-Stretch controller object in the scene, then you can change its value by using this spinner.
Object Locks: Turn on any axis in the Move, Rotate, or Scale group box to lock the axis.