If you are co-teaching a course with someone or there is reason for someone else to be given instructor status for your course, reach out to your department manager or chair to have them added at the Mosaic level.
Adding an instructor within your outline does NOT give them instructor privileges. This is merely a way to share an instructor’s name, email, office location, etc. with people reading your outline.
If the person you want added to your outline as an instructor cannot be added in Mosaic, please contact course@mcmaster.ca