Generally, a special duty is an additional lesson which is not scheduled in the regular timetable and which does not result from a substitution or a shift. For example a special duty can be defined in the scheduling dialogue or it can be created through the lesson pool. You find more about the procedure in the respective chapters. If you want to create more than one special duty (e.g. a multi-period exam or class teacher lessons at the beginning of the year) then you can use the special duties window.

You can open this window via the context menu of the right mouse button, via the button <Special Duties>or via "Modules | Cover Planning | Special Duties".