How often do your remove the camper from the truck?

"Trailer mode" combines the 2 views from side mirror cameras side by side.
This way you can see camper lining without the angle error mirrors are giving you.
I post a picture of it in 1 of the older threads, but can't find it now.
My Fleetwood has wider end and I had to put it on actually touching the truck gate opening on driver side, so lining up 6000lb camper is pretty important as you can't push it much by hand.