Adding a class to a Double Period

Hi Ross,
One class is doing two periods of the same subject matter in the same classroom. How do i add the same class to the second period because i am not seeing the same class or location in the drop-downs in “add class to period” under Manage Timetable?

Willpro, this is prevented in the system in order to prevent room clashes when data are entered. My usual response to this would be to create a combined class (e.g. if we have SC10.1 and SC10.2 I might add a third SC10.3 or SC10.C, for Combined, with all the teachers and students from SC10.1 and SC10.2), and when the classes are studying together, timetable it with that class. Does that help? Ross.