How to add the same lesson with multiple lengths in Timetables online

You can add a lessons with different lengths (single, double,...) directly in lessons dialog. Different length can be set with "ADD" button and the new row will be created. Selected teacher, subject, class /group, joined classes/ and classrooms remains the same.

Notes:
- If you do not know how many of these lessons will be double and how many single you can use card relationships I want to have 1+1+1+2 OR 1+2+2 lessons per week.
- with this option you can add lessons with different weeks setting also