Support EDT

Go to the tab Timetable > Lesson > List.
Select the lessons taking place in the same period, right-click and choose Modify > Period if possible.
In the pop-up window, un-tick the periods when the lesson does not take place and validate.

You can also proceed with mono-selection, by double-clicking in the column Periods.

Can't find an answer to your question ?

Specify the lesson period prior to placement