Win10 sets two monitors not to use the same wallpaper
This feature exists in WIN8, but Microsoft canceled it in WIN10 (eliminating the dual-screen setting of separate paper)
You can complete the setup in the following ways:
1) WIN+R opens the run window and copies this command
Control / name Microsoft.Personalization / page pageWallpaper
2) after copying, press "OK" or enter directly
3) you will see the setting interface hidden by WIN10
4) find the folder you need
5) all pictures cannot be checked.
6) which picture needs to be set as paper, right-click directly, and then set it to the corresponding screen
7) "Save changes" in the lower right corner of the point
8) over