A string matching the window class (WM_CLASS property) The window class can be found out by running'xprop _BAR_ grep WM_CLASS 'and clicking on a window (use either both parts separated by a space or only the right part). NOTE: If you specify neither window title nor window class, then the very first window to appear will be taken; omitting both options is NOT recommended.
In tekentrieme dy ferlykber is mei de finsterklasse (WM_ CLASS eigenskip) De finsterklasse kin fûn wurde troch it útfieren fan 'xprop _BAR_ grep WM_ CLASS' en it oanklikken fan it finster. (brûk of beide dielen, skieden troch in spaasje of allinnich it rjochterdiel). Tink derom: ast gjin finsterklasse of finstertitel spesifisearret, dan wurd it alderearste finster dat ferskynt brûkt. Net oan te rieden.