Cannot find Button for autoscroll

Hi, I am new to Orux maps and cannot find a button to center the map to the current GPS-position.
Specially when I am not in tracking mode, I would like a way to scroll the map to my position automatically.

Is there a list describing all the buttons that can be attached to the right and left sides of the screen? I dont understand the sense of all of them.

Thank you for help!
Andreas