To set up an additional monitor, connect the monitor to your computer. If your system does not recognize it immediately, or you would like to adjust the settings:
Open the Activities overview and start typing Displays.
Click on Displays to open the panel.
Click on the monitor that you would like to activate or deactivate, then in the list of monitor configuration select Turn Off to deactivate the monitor, or one of Primary, Secondary, or Mirror to activate it.
The primary monitor is the one with the top bar, and where the Activities overview is shown.
To rotate the orientation of the monitor, use the buttons with the arrows until the preview is correct.
When you are happy with your settings, click Apply and then click Keep Changes.
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