I've seen seen several questions relating to this, but no really good answer yet.  Canvas doesn't seem to have a way to make a quiz add 0 points to the denominator of the final grade -- that is, to be a true, standalone, extra credit quiz.  I'm assuming I just haven't figured it out, because the extra credit quiz has existed for eons and no LMS developer would accidentally forget to include it as a feature.  [I know how to add extra credit to exams, but those already have a non-zero denominator.]  Is there a straightforward way to do this -- that is, without resorting to a gimmick or workaround?  Thanks.