You can also add elements to a lesson this way.
Go to 'Classes', select the respective class and select an additional class by pressing and holding the 'Ctrl. ' key.
In the substitution window, this will be shown as 'Lesson changed'. Now both classes are shown in the 'Class' column, the original and the added class. If the added class has a lesson already scheduled at this time, an additional cancellation is generated for the original lesson.
You can add another teacher to the lesson by using the 'New teacher' function. A second tab is shown in the window which provides information on class, subject, room and student group and you only need to select the respective teacher.
A special duty is created for the added teacher. If the selected teacher is already scheduled for a lesson at this time, an unscheduled substitution or a cancellation is generated..