Moodle 2.9.5
For some teachers the alphabetic first name, last name filters do not appear on the Grading Table screen when grading individual assignments.
I have looked at grader report preferences and user preferences, but can't see anything that would hide or show the alphabetic name filter.
See screenshots below.
Logged in as myself, everything is as it should be.
When a Colleague logs in, same course, same assignment, same roles, but no alphabetical index.
If anyone can help I'd be very grateful.