The invention relates to a method for comminution of material in a grinding mill, in which method the ground material from the mill is classified by means of particle sizes. The gear indicator is coupled to a shift operating device via an indicator cable. In addition, molding the groove material may include forming the groove material such that an outer surface of the groove material extends radially outward beyond the outer surface of the outer cover layer. Based on the type of editor associated with the property, one of a number of predetermined graphical user interfaces is selected.