Is there an option to flag an assignment submission? I searched the canvas guides and did not find any reference to it. In D2L, it was possible to flag a submission to indicate there was a problem with the submission (could be the student used a format that can't be opened, could be poor work). It was also easy to search search flagged files. This is an important feature when one has student graders helping to grade. In D2L, the graders could flag files for the instructor to easily find and review. Also, I do not see a way to search for a particular student while in speed grader. Is this possible? This was an attractive feature in D2L as well.