The Edit Button is a a grey underlined "Edit" that appears after a comment. It allows the user to edit the comment after it has already been posted. On MSTI, the Moderators have access to an edit button on every single comment, while normal users do not have access to it at all. SpaceDodgers has vigorously campaigned to have the edit button instillated for all on MSTI.
An edit button was finally introduced in January 2015 to celebrate Dodger Digest's 1 year anniversary. However, the user is only allowed to edit a comment within the first 5 minutes of posting. Havoc and obsessive compulsive disorder was had by all.