12 How to assemble your monitor hardware Rotating the monitor1. Pivot the display.Before rotating the monitor with a portrait viewing orientation, the display has to be rotated 90 degrees.Go to Start and Control Panel on your computer, select the properties or controller of the graphics processing units (GPU) on your computer. Select to rotate the display 90 degrees, and follow the on-screen instructions to complete the settings.Refer to the product specificat ions of your computer to find the GPU name...