Moving a period to a non-highlighted cell is not possible without creating a clash. The lesson details window displays the lesson number and details of the lesson in conflict with the moved period.
If you decide to drop the period in such a cell, a window will appear showing the following two options:
| • | <Cancel> - cancels the move. |
| • | <Save block> - the 'dragged' (i.e. active) period will be scheduled and the original period will be unscheduled. |
| • | Use the combo boxes save with teacher, class or room clash to schedule a lesson with conflicts. |

The period details window displays all the elements of the lessons scheduled at this time. Display conflicts in the timetable by activating the option "Separate periods in case of clash" ("Layout 2" tab under <Timetable Settings>). Please also see chapter "Layout 2" in the section "Timetable display" ).
Each of these lessons can be selected and moved separately.

You can also move all lessons that lie on one position (either as clashes or as a cluster in course planning).
Timetable in the cluster mode
If you wish to switch the timetable to the cluster mode altogether then check "Drag Drop: Multiple lessons" on tab "Layout 2" in the timetable settings.

Selection with the <CTRL> key
If you usually wish to select just single lessons (courses) but occasionally you also wish to shift the whole cluster, then press <CTRL> and click on the relevant position. You can move all lessons in this period in a single operation.

Decoupling
A coupled lesson can be decoupled direct in the timetable and the new lesson that is thereby created can be scheduled in another position.
Example: The coupled lesson in periods 7 and 8 on Tuesdays is to be decoupled as teacher 'Ander' is to teach his group on Thursdays. Click on the period with the right mouse button and select "Decouple". The lesson is then decoupled and the new lesson with teacher 'Ander' can be easily rescheduled using drag and drop.
