/schemas/apps/mate-volume-control/ui/window_height /apps/mate-volume-control/ui/window_height mate-volume-control int -1 Height of the Window Height of the window to be displayed. /schemas/apps/mate-volume-control/ui/window_width /apps/mate-volume-control/ui/window_width mate-volume-control int 500 Width of the Window Width of the window to be displayed.