I use 3 screens at the same time running X-Plane 10.32 in a Dell Inspiron 17 Laptop running Windows 8.1 64B. 2 screens are 27 in 1920x1080, rotated 90 deg to be in portrait orientation for a combined resolution of 2160x1920. One is linked to the laptop by HDMI and the other one by VGA. The third is the 17 in 1920x1080 screen of the laptop. Windows 8.1 takes care of all of them. Control Panel\Appearance and Personalization\Display\Screen Resolution Just drag the position of each screen to match the actual postion of them. Extend desktop to all of them. Set the orientation. In my set up, the left one must be portrait because it is rotated 90 deg cw and the right one is portrait flipped, because it is rotated 90 deg ccw, so the common side of both is their upper side. X-Plane sees the 3 screens as one big screen. Simply resize X-plane window to fill the 2 big screens. The new aspect ratio is optimal for the Cessna 172SP wide panel, for example. Just one little problem, as the panel is so tall, you can't see the taxiway when taxiing at low speed. The cure to this problem is to set the Vertical Offset for Networked Scenery to -005.00 deg (X-Plane 10 => Menu Settings => Rendering Options) The laptop screen is used to display the real charts of the airport downloaded using Aviation Tools Free in Android. You can get it from play store. Hope this helps.
