This page explains how to change screen orientation in macOS Sequoia (15) / Sonoma (14) / Ventura (13).

Extend displays
Rearrange displays and set main display
Mirror displays

Extend displays

1. Click on Apple mark and select "System Settings..."
   
   
   
    
2. Select "Displays"
   
   
   
   
    
3. Select the monitor you want to set as the main display, and select "Main display" from "Use as".
   
   
    

Rearrange displays and set main display

1. After extending displays, the actual arrangement of the monitor may show differently on macOS.
   Select and drag the display to the desired position and select Done.
   
   
   
   
    
2. The macOS icon and Dock will always display on the main monitor.
   If you want to change the main monitor, drag the menu bar to the other monitor.
   When using a ColorEdge monitor, we recommend setting the ColorEdge as the main monitor.
   
   

Mirror displays

When you want to display the same screen on multiple monitors, Right-click the monitor you want to set as the main monitor and select "Mirror Built-in Retina Display" (for Retina model) from the list.

• When mirroring a display with a different resolution, the lower resolution will be given priority. Monitors with higher than recommended resolutions may cause blurred images, broken aspect ratio, or areas to be made not visible.
• If using a ColorEdge monitor, calibration with ColorNavigator cannot be performed when mirroring displays, so please set the monitor to multi-monitor.