To add a rating to a submission, simply select a star rating (1-5) from the rating column next to that submission. You can add the same star rating to multiple submissions by checking the box next to all of the submissions that you would like to include and then click the star dropdown menu that is directly above the first submission at the top of your inbox. From there, you can select a star rating of 1-5 to assign to all of the submissions that you have selected. You can also sort your inbox to display submissions by rating. To do this, select the "All Ratings" drop-down menu near the top of your inbox. From there, you can select a rating to show only those submissions that have been given the rating you choose in your inbox.