Corners feature

i am a new user invoking the bells and whistles of this distribution… I’ve dabbled around with deepin-linux, and noticed the ability to set corner-launch settings with the mouse.

I also noticed that earlier editions had this feature available ( UbuntuDDE: New Ubuntu Remix With Deepin Desktop is a Beauty - YouTube – introductory video with ubuntudde – shows the similar corner-launch feature with the official deepin-linux distro).

is this feature disabled by default? I can’t seem to find a setting for it…yet I see it was available on an earlier build as shown on the above video.