To add a module, use either the right-hand menu to drag and drop a module into a group, or the 'Add Module' drop down box at the bottom of each group.  Please note that the list of modules in the right hand column will show all modules available, regardless of semester, but the 'Add Module' list will only show modules that match the semester of that group.

The list of available modules will default to the School that matches the programme. To select modules outside of this School, expand the 'Module filters' section to update the Owner value to the School from which you wish to select a module.