The "Class conference" function in the "Special duty" window is used for gatherin all teachers of a class in a certain period. First, select the respective period(s) and then select "Class conference". In the dialogue window popping up, you can restrict your selection to one class, and you immediately see which teachers teach this class.
Click on < OK> amd the teachers are exported to the "Special duty" window. In the window, you can additionally enter a room or a subject. Again, confirm with < OK> and the respective special duties are generated for the respective teachers. Clashing classes are automatically becoming unscheduled substitutions or cancellations according to the substitution time grid.