in factory mode how to move to next menu? tevion lcd 42031d

[jimbofz]

Good morning all ,
once in factory menu using i/p2580 or menu r,g,b,y.
there are no adjustments for lvds or geometry ,backlight ect
 so ther must be a way to move to the next page of the menu
ive trawled the net with no luck ,any ideas please