Is it possible to switch from one camera to the next while in reverse with out using an after market switch?  I’ve wired both cameras for a rear view. First camera is on the rear of my truck like a normal rear camera view. Second camera is located up on the top of the truck near the third brake light.  I want to be able to switch camera views for when backing up to a 5th wheel trailer I can see the bed of the truck and not the bumper.  Has anyone tried this?

the radio has that option. its in the rear camera setting.

Yeah bonee, I've tried every option I've thought but no luck

https://www.youtube.com/watch?v=6VY10uChNTI

Thanks bonee, but they are just videos how to set them up.  My question isn't how to install them or switch from one camera to another while at idle.  My question is, when the vehicle is "in reverse" am I able to switch from one camera to another?  I can't seem to find anything about this.  When the vehicle is in reverse it seems it will only look for the one camera