User Manual

Arrange your displays or change your primary display
So that you can move apps and windows across your displays in one
continuous motion, arrange your displays to match the setup on your
desk. You can also change your primary display, which is where your
desktop icons and app windows first appear. Here's how:
1.Choose Apple () menu > System Preferences, then click Displays.
2.Select the Arrangement tab.
3.Arrange your displays or change the primary display:
.To arrange your displays, drag one of the displays where you want it. A
red border appears around your display as you arrange it.
.To change your primary display, drag the white bar to another display.
The Arrangement tab of Displays in System Preferences