Venues, teachers, or groups may not be available for teaching at certain times during the scheduling period. It is also possible that there are times when these resources should not be scheduled, but may be scheduled if absolutely necessary. This information is entered using the availability table for the resource.
This table has, for each period of each scheduling day, a field which contains a symbol representing the availability of the resource at that time. A green tick means that the resource is available, a yellow question mark indicates that the resource may be available if absolutely necessary, while a red cross means that the resource is not available at the corresponding time.
Each symbol can be changed from tick to question mark to cross, and then back to tick, by clicking repeatedly on the field with the left mouse button. Clicking on a weekday abbreviation changes the symbol for every period of that day in the same fashion, while a click on a period number changes similarly the symbol for that period of each day. A click in the upper left corner of the table changes every symbol in the table.