By default, all submitted essays actually have their own page. You can access that page by clicking on the permalink at the top of the individual essay screen in the WordPress admin.
As an admin, if you’d like to leave a comment for the user:
- Make sure “Allow comments” is checked in the Discussion section
- In the Comments section, click the “Add comment” button
- Type your comment
- Click the “Add Comment” button to save your comment
Your comment will now appear on the essay page mentioned above.