Resolution 1920 x 1080

hi all

i run 3 screens at 5760 x 1080 and the game runs sluggish at that resolution as you imagine 

when I change the resolution to 1920 x 1080 it still stretches across 3 screens I can untick full screen what will bring the game to one screen

but can't scroll around game using the sides 

in other games I can change the resolution back down to 1920 x 1080 and it will blank out the side monitors and just leave the centre screen 

is there a way to get this to happen 

but cheers for a great game so far