On my 12 year old car, I manually point my mirrors at the ground when I'm reversing. I thought everybody did this. How else do you align yourself with the parki

On my 12 year old car, I manually point my mirrors at the ground when I'm reversing. I thought everybody did this. How else do you align yourself with the parking space? To see what's behind me, I mostly turn around to look. Too many blind spots to trust a mirror for that. However on newer cars with cameras, I am guessing they offer a less obstructed view.