The passenger side mirror is a convex mirror. What is the best judgement to change lanes?

And how to adjust the side view mirrors. Thank you.The passenger side mirror is a convex mirror. What is the best judgement to change lanes?
The Messerschmidt Twitch';. You quickly glance over your shoulder just before moving over. I would never change lanes based strictly on what I see in the mirrors. In the next few years, you will see a huge number of cars with lane change warning systems telling you something is over there. Volvo has them. My Mercedes has the system. I laughed when I saw it. After trying it though, I wouldn't drive without it.The passenger side mirror is a convex mirror. What is the best judgement to change lanes?
adjust where you can just see right rear corner of your car