The system settings of Deepin are all changed in one place 

Control center or dde-control-center

It will hold all the possible settings of your Deepin desktop.

But first how to get to this control center

  1. icon on dock to control center
  2. type control center in menu
  3. efficient mode has an icon to the control center
  4. CTRL + ALT + M is the ArcoLinux keyboard shortcut to get to the control center