In order to tell if you're missing something, you have to first tell us something.
What OS are you running? What type of card(s) do you have? What displays and how are they connected?
Setting up a multiscreen display is usually done via the driver software of the card, not in the game.
I have a 3 screen setup running fine at fourthousandsomething times somethingelse.
You are a life saver
I had to go back into the Nvidia driver and re-do the "surround" set up and I now get a healthy looking " 5164x1050 " display option in-game which I spread over the 3 screens.
Many thanks for your help.
Nice. I nearly went the three screen route myself but instead run 3440x1440 21:9 on a 34" LG monitor.
how did you do? I got NVIDIA GeForce GTX 770
but in the ED screen options I have only 1920x1080 ...
please the trick for triple monitor
thanks
you have to go into the nVidia control pannel and set up surround it's under the 3D settings -> Configure Surround, PhysX