How do I change the status of an entire column (not just 1 person) from "missing" to "none" in Grades without changing the due date? I import grades from an external web based tool. It is always after the due date that I enter in Canvas. I need that due date in Canvas so that students can know when do to the assignment. After I import the grades, they are still listed as "missing" and I have to either remove the due date or go through individually to change the status in grades. How can I change the status for the whole column in Grades? Thank you.