Hi Teresa,
Thanks for that -- very nicely label screenshot by the way! I did experiment a little with the -/+/o, and it is functional, but not quite what I was hoping for. I guess I am thinking of one more layer before the grader displays where the instructor can select which category they want to interact with, and then only that category is displayed. In our setting, we tend to have many assignments and many labs, so the grader will get very large. Clicking the -/+/o tends to be a little tedious.
Thanks for the info!
Carvell