code: func DesktopLayoutSet(xu *xgbutil.XUtil, orientation, columns, rows,
  	startingCorner uint) error {
  
  	return xprop.ChangeProp32(xu, xu.RootWin(), "_NET_DESKTOP_LAYOUT",
  		"CARDINAL", orientation, columns, rows,
  		startingCorner)
  }
docs: // _NET_DESKTOP_LAYOUT set