From the owner's manual. The mirrors can be configured so that when reverse gear is selected, the passenger door mirror is automatically adjusted to provide an improved viewing angle for reversing.

The exact dipped position can be adjusted using the joystick control, when the mirror is dipped. The next time reverse is selected, the newly adjusted position will be selected.

When the gear selector is moved out of reverse, or if vehicle speed exceeds 7.5 mph (12 km/h) while reversing, the mirror will return to its previous position.

Mirror dip can be selected or deselected from the instrument control panel. Press the OK button on the joystick control on the right side of the steering wheel. Use the "down" arrow and select Vehicle Settings, then Features. The mirror control option is in that sub-menu.