Some columns are completely disabled until the status of the assignment is changed. Disabled columns do not include dashes in the Gradebook cells, which indicates that grades cannot be entered, and display a gray background.
Disabled columns are labeled for unpublished assignments  and anonymous assignments . Grades cannot be entered for unpublished assignments until the assignment is published. For anonymous assignments, grade cells do not display any content, including the Needs Grading icons, until assignment grades are unhidden.
Note: Assignments that are both anonymous and moderated display as anonymous, though the Grade Detail Tray displays the assignments as being hidden. Moderated hidden assignments can be updated in the Gradebook, but any entered grades will be overwritten once final grades are posted.