On my N800, it's easy to toggle between autocenter lead, autocenter lat/lon, and autocenter off using the center button of the d-pad. If I pan the map, a quick press of the button restores the autocenter setting I had. I don't know if the N810 has something similar, but you should be able to map that to some button. My D-pad is set up with up/down being zoom/unzoom, right/left being rotate the map, and the center button being the autocenter toggle. The home/menu/return button can also be mapped as desired.