It is completed for the next patch.
There are 3 modes of operation.
Pan mode. Continual pan like mouse look.
Snap Mode. Instead of pan it smothly goes to the closest view.
Transition mode, It move your head instead of Rotating it.
Also if you are in Pan or snap mode and press a view key, the tracker switches to move mode untill all view keys are released.
I.E. you can press look back, then just move your head to see around in the back view.
Both pan and snap mode use the closest saved head postion.