If the options are as they are on the Touch then they are:
- Screen in Thirds
- tap on left, go back
- tap on right, go forward
- tap center, bring up menu
- drag right to left on left third of screen, go forward
- drag left to right on right third of screen, go back
- 1/3 left, 2/3 right
- tap on left, go back
- tap on right, go forward
- tap bottom center, bring up menu
- drag right to left on left third of screen, go forward
- drag left to right on right two thirds of screen, go back
- 2/3 left, 1/3 right
- tap on left, go forward
- tap on right, go back
- tap bottom center, bring up menu
- drag right to left on left two thirds of screen, go back
- drag left to right on right third of screen, go forward