Control how fast your TRACKBALL moves vertically and horizontally from the TRACKBALL settings screen. To open the TRACKBALL screen, from the Jump screen, press MENU then select Settings > Trackball. Highlight, then select a slider to open it for adjustment. Roll the TRACKBALL right to increase the speed; left to decrease.
Trackball Clicks

If you want to hear a quiet "click" when you roll the TRACKBALL, select the Allow trackball clicks check box. Note that if you want one of your Sound Profiles to include TRACKBALL clicks, then you must select this check box.