Claoner Dash Cam D2

[GrandadMark]

Hi

Wonder if anybody can help

I've just installed a Clloaner D2 dash cam in my Granddaughters car and there's 2 things I can't to get to work and there's nothing in the so called User Manual. 

The 1st thing how do you swap from front to rear display on the screen of the dash cam.

The 2nd thing it's wired up so when I engage reverse the 4 led lights up but the screen display is still showing forward and the user manual well what can I  say there's nothing in the manual.