When I manually upload a new version of a document, I can add a comment to the new version. If I edit in ms office and save, I get no option to add a comment and it saves the version, noting "No Comment". It wouldn't be a problem if I could edit the comment after, but there doesn't seem to be a way. It seems a bit silly to have to download the document every time to make a revision when it would be much easier to edit in Office and save.