Select your school, start date and template.
Class and teacher colours may be changed (for testing best colours), but once decided, update permanently in Timetable Templates (Edit).
Select "Calculate" to display the timetable.

Classes need to be added first, then rooms and teachers.
Drag Classes/Rooms/Teachers as indicated.
A number of checks take place and warnings displayed of conflicts/overbooking situations. Screen colours also change to indicate continued presence of possible conflicts.

For example:
2 teachers in 1 class, a cell shows in orange:

Double-click to show second (or third) teacher. Teachers can be dragged to another class or returned to the teacher list.

Classes can be dragged to another room, and if a teacher(s) has already been allocated, then the teacher is automatically moved to the new room as well.

A red teacher cell means that there is a message to be displayed.

Alternatively, teachers with any unavailability (background highlighted) can be selected (double-click) to show details.

Insert Once
This will simply drop the teacher into the selected class and is how the system has worked historically.

Insert in All Empty Classes
When the teacher is dropped into a class, they will also automatically be dropped into every other occurrence of the class where no teacher has been assigned to it.

Replace in all classes
When a teacher is dropped into a class where a teacher has already been assigned, the existing teacher will be replaced along with every other occurrence of that teacher where they have been assigned to that class.

The "Fast" mode will remove all the colours and some validation, but will make the drag/drop process a lot quicker.
Experiment with the other button around the screen.

Timetable Views
Select View (Class, Room or Teacher), and output to Excel if required.
Below is an example of a Class 'View':