Question
How do I change one or more of my monitor displays to Portrait?
Answer
Right click anywhere on your desktop and then choose Display Settings.
You will have at least two display windows showing at the top of the Window.
Choose the display that you want to change. You can click on the Identify Button to make sure you know which display you want to change. A number will flash at the bottom of each monitor to let you know which one is which.
Scroll down on the Display Window until you see Display Orientation.
Landscape is the default. Click on the drop-down arrow to choose Portrait. You will get a notice asking if you want to keep this orientation change or revert. Confirm your selection. The Display will change.