To use the Accudrive feature simply press the eCalibratef button. Two near the center will show the current deadband setting, and two green near each end of the display will show the current maximum range adjust the settings, use the eUp/Downf buttons on the D-pad to deadband, and the eLeft/Rightf buttons to widen/narrow the amount of needed to move the wheel to achieve maximum turning position. The and maximum range features offered on this controller are in addition calibration adjustments which may be made by the game software.