Academic Settings / Marking Settings / General Settings / Assessments & Assignments / New Assessment Configuration / Enable Invigilators field on Assessments/Assignments
If you enable Invigilators field on Assessments/Assignments, then this field will be unhidden on Assignment/ Assessment scheduling form as well as in all associated views.
Invigilators can be any other Lecturers.
Setting-> Active
Setting -> Inactive
