Laptop external display

-----》 Expand these displays

How to switch the mouse between two screens with the external display of the notebook ：

https://jingyan.baidu.com/article/54b6b9c0233c506c593b4734.html

Close the cover of the external display of the notebook and continue to work ：

https://jingyan.baidu.com/article/c45ad29cda9b49441653e259.html

ubuntu:

Ubuntu18.04 Initial connection of external display _liuslient The blog of -CSDN Blog

Actually sum window It's like , Also pay attention to the direction of the main screen and sub screen .

If only part of the screen is displayed , You can close your laptop , The sub screen will be fully displayed .