Re Routing Screen Dominates Data Screen

When either I accidentally take the wrong route or choose to, the rerouting screen dominates the display so I don't see the other data which can be frustrating especially when I'm trying to keep within HR zones. I'm looking at buying a power meter but this issue is putting me off buying. 

Is there a way in which I can manage the rerouting screen.

I know I should be ploughing through the manual but dyslexia ia a pain!

Thanks and hope you can help.

Simon