Arddull botymau'r ffenestr. Gall fod: "testun", "eiconau", "y ddau", "bar offer". Os mai "bar offer" sydd wedi ei osod, gosodiadau bar offer GNOME sy'n penderfynu arddull y botymau.
The style of the window buttons. Can be "text", "icons", "both", "toolbar". If "toolbar" is set, the style of the buttons is determined by the GNOME toolbar setting.