How to hide title bar

[VladimirCores]

Good day deepin team,
In Chrome I've found the option to hide the "title bar" of the app, it takes too much space on the screen and I'm wondering how can it be done for other system applications?

Peace,
VC

[BLumia]

DDE/deepin applications are using Client-Side Decoration which means they don't have a title-bar from the window manager, so actually there isn't a title bar for hiding ;p