Rotate the image on your Mac display
Depending on your display model, you may be able to rotate the image on your display. For example, if you have a widescreen display but would rather have a display that is taller than it is wide, you could rotate the display’s image 90 degrees, then physically rotate the display, if possible.
Before you begin, check the documentation that came with your display to make sure you can safely operate the display when it’s rotated. Then follow these steps:
On your Mac, choose Apple menu > System Settings, then click Displays in the sidebar. (You may need to scroll down.)
Click the pop-up menu next to Rotation on the right and choose how many degrees to rotate the image on your display.
In the dialogue that appears, click Confirm.
To return your image to its original rotation, click the Rotation pop-up menu and choose Standard.