How do I mark a WordPress comment as Spam?

Step 0: Find the comment you want to mark as spam

Comments appear e.g. here: https://www.mtdemocrat.com/wp-admin/edit-comments.php

Comments that are already marked as spam appear e.g. here: https://www.mtdemocrat.com/wp-admin/edit-comments.php?comment_status=spam

Step 1: Hover over comment on desktop, click the red "Spam" link