How to change merged lessons in Timetables Online

At first select the merged lessons in the list. Then you can:

A - change the entire merged lesson (single AND double) (e.g change the teacher for both lessons, or add new lesson with different length) - you can do so in the standard way - by clicking on "Edit lesson" button.

B - change only a part of the merged lessons (single OR double) (e.g. double lessons shall be in different classroom, or you wish to change the teacher for single lessons) you can select specific part via "Edit part" button . After this change, lessons will not be merged anymore.

Note
- Even if you use "Edit part", but you change only the count or length of the specific lesson, they will still be displayed as merged.
- program automatically merges lessons with the same subject + teacher + classes + classrooms.