I have made an assignment activity in my moodle course. The students have uploaded their work and I have been able to download all the submissions as a zip file. I have used the edit tools in Microsoft word to give them feedback and would now like to upload the files back onto moodle. When I go into the the assessment activity then click "veiw/grade all submissions" in the grading action drop down menu there is only "download all submission" and "view gradebook" there is no upload option. Is there something I need to change in the assessment setting so that this option shows?