How to change multiple display to portrait

To change the display orientation of your third monitor to portrait, follow these steps:

1. Open the Settings app on your Windows device.
2. Navigate to the Display settings.
3. Locate the section for multiple displays and select the third monitor.
4. In the orientation settings, ensure that Portrait is selected.
5. If the monitor still displays in landscape after changing the setting, try disconnecting and reconnecting the monitor or restarting your device to apply the changes.

If the issue persists, check for any graphics driver updates or settings specific to your graphics card that may override Windows display settings.

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Did the display position preview changed to portrait on display settings?

Another way to change the display orientation is by changing this setting on the graphics adapter control panel. This depends on where the display is connected to. If it is on the motherboard, this can be changed on the Intel graphics or AMD Radeon Settings. If it is connected to the motherboard, change it on the graphics card control panel.