Enable CSD in GNOME Terminal

If you aren't using GNOME but for some reason want to use GNOME Terminal in other desktop environments (e.g. Sway or XFCE), you just might want to embrace client-side decoration (CSD), so it looks like this:

Unfortunately, CSD is not used by GNOME Terminal if you launch it outside of GNOME. Fortunately, there's a configuration option you can use to explicitly enable it. In order to do that just run the following command in your terminal:

$ gsettings set org.gnome.Terminal.Legacy.Settings headerbar true

Please note, the setting won't be applied as long as there's a running copy of gnome-terminal-server process. You have to terminate it and restart the terminal. The configuration option is tested with gnome-terminal 3.40. It might or might not work with other versions.