This option determines the effects of double-clicking on the title bar. Current valid options are 'toggle-shade', which will shade/unshade the window, 'toggle-maximize' which will maximize/unmaximize the window, 'toggle-maximize-horizontally' and 'toggle-maximize-vertically' which will maximize/unmaximize the window in that direction only, 'minimize' which will minimize the window, 'shade' which will roll the window up, 'menu' which will display the window menu, 'lower' which will put the window behind all the others, and 'none' which will not do anything.
Aukera honek titulu-barraren gainean klik bikoitza egiteak sortzen duen eragina zehazten du. Unean balio erabilgarri hauek daude: 'toggle-shade', leihoa biltzen/zabaltzen du; 'toggle-maximize', leihoa maximizatzen/desmaximizatzen du; 'toggle-maximize-horizontally' eta 'toggle-maximize-vertically' balioek leihoa norabide horretan soilik maximizatzen/desmaximizatzen dute; 'minimize', leihoa minimizatzen du;'shade' leihoa biltzen du.'menu', leihoaren menua bistaratzen du; 'lower', leihoa beste leiho guztien atzean jartzen du; eta 'none', ez du ezer egiten.