+ button not on back up screen only on ded view?

I'm pooped and the search came up with nothing.
I don't see a + on the back up view but on the bed view I can zoom? Noticed this last week when I had to move a customers JLG I'm working on.

Really could us the zoom to see the hitch better with these old eyes so what am I missing?

 

I’d have to look at mine and get back to you. I think all you can do is change it to full screen instead of showing the surround view as well and that will give you a better zoom. I’ll look at mine and let you know

 

I wonder if that's why?
Bed view is full and back up view is showing surround also.

 

That was it, I had the surround on.
Thanks @Alex261

 

Glad to help