@NatoBoram answer is my favorite. A tiny supplement for elementary OS 5.0 (Juno) and 5.1 (Hera) the answer works.

Windows-like layout (three buttons on top right corner):

gsettings set org.gnome.settings-daemon.plugins.xsettings overrides "{'Gtk/DecorationLayout': <':close,minimize,maximize'>}"

MacOS-like layout (three buttons on top left corner):

gsettings set org.gnome.settings-daemon.plugins.xsettings overrides "{'Gtk/DecorationLayout': <'minimize,maximize,close:'>}"

I prefer this layout (close button on the left, minimize and maximize buttons on the right):

gsettings set org.gnome.settings-daemon.plugins.xsettings overrides "{'Gtk/DecorationLayout': <'close:minimize,maximize'>}"

NOTE: do not leave any space in 'close:minimize,maximize'.