How should the rear view mirror be adjusted?

The rearview mirror should be adjusted to frame the entire rear window because this positioning allows the driver to have the best view of what is happening behind the vehicle. By ensuring that the entire rear window is visible in the rearview mirror, the driver can accurately judge the distance and speed of vehicles approaching from behind, as well as identify any obstacles that may be in the way. This proper adjustment is crucial for safe driving and effective maneuvering, especially during reversing or changing lanes.

Adjusting the mirror this way also helps to enhance overall situational awareness on the road, as it ensures that the driver is not just focused on a small part of the reflection but can see a wider field of view, which is vital for making informed driving decisions.