Mazda 3 Owner's Manual page 370

When Driving
Rear View Monitor
5. Once they are parallel, straighten the wheels and back your vehicle slowly into the
parking space. Continue checking the vehicle's surroundings and then stop the vehicle
in the best possible position. (If the parking space has division lines, check whether the
vehicle width guide lines are parallel to them.)
(Display condition)
6. When the shift lever is shifted from R to another shift lever position, the screen returns to
the previous display.
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(Vehicle condition)