Our institution recently moved to Canvas (in the past year). I have a faculty who said in Blackboard they could write comments in assignments and just save them, but not submit. This allowed for them to be edited before grades were shown. That way, the faculty could do an initial grading and then go back and tweak some comments as needed.
I don't see a way of doing that beyond copy/edit comments and deleting the original one. Is there an idea up for vote about adding this grading feature in Speedgrader? I didn't see one, but I could be searching the wrong key words.