How to do multi-screen setup under Mac

How can we manage the two-a-a-year screen after we give the Mac an external monitor? Sometimes we need to use the external screen as the main screen, and the computer screen as the expansion screen, how to set it? Today, the small series to solve these problems.

To set the method:

1. Turn on System Preferences "monitor"

2. In "arrangement", the white bar is placed on which screen, which screen is as the main display! You can also drag any screen to set it to the left, right, top, or bottom.

3. "Mirror display" option is, the two screen display content, like, generally do not tick!

This is the way to manage the two monitors after you add a monitor to the Mac, and users who need or are interested can try to operate on their own computers.