UPDATED: QUADscreens (4,200 x 1,680) -- fka: triplescreens 41-inch uberHDTV (3,150 x 1,680) - 3 x 20" monitors in portrait

Step 3 Rotate each screen in Display Properties (in this example NVRotate)

rotate each screen -- for these BenQ monitors, their controls are on the right edge of the screen, so I turned them all on the LEFT edges, so that the buttons end up on the top of each screen and easily accessible