In the new gradebook, teachers can flag assignments as late or missing.  However, this has to be done student by student.  It would be much more efficient if teachers could fill multiple students' scores as late or missing using "set default grade".  For example, an instructor gives students grades on an assignment, but several scores are left empty.  If the instructor wants to give each remaining blank score a "missing" status, they need to tag each of these one-by-one.  If teachers in this situation could use "set default grade" and mark each ungraded assignment as missing all at once, it would save instructors substantial time.