Mazda 3 Sedan 2020 Owner's Manual page 391

When Driving
Rear View Monitor
(Predicted vehicle path assist lines display type)
When reversing near a three-dimensional object
When reversing near an overhanging object, the vehicle may hit the object even if
the anticipated course line does not contact the object on the screen. The position
of the object displayed on the screen is different from the actual position because
the anticipated course lines on the screen are displayed based on a horizontal road
surface. When backing up near an overhanging object, confirm the rear and
surrounding conditions directly with your eyes.
1. (Screen display)
2. (Actual view)
4-237