Setting the main screen when CentOS 7/gnome 3 dual screen

The way you set up your extended display as a primary screen in Windows is very clear, but not so obvious in Linux, and here's how to do this.

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1. In Settings, turn on the "display" setting

In this interface, you can see your two screens and can set their relative positions, but after setting it up it is not known where to set the main screen, 1

2. Set the home screen in the display settings

You can see that the status bar is displayed above the main screen in the "display" setting, so you can drag the status bar (the design is very discreet) to the monitor that you want to set as the main screen, and complete the home screen setting, 2

(Here, I set AOC to my home screen, drag the black status bar to the AOC)

3. Apply Settings

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Note: CentOS 7 uses Gnome 3.8.4, and this method should be applied to gnome 3.

Setting the main screen when CentOS 7/gnome 3 dual screen