You can add comments to an issue by filling out the comments box at the bottom. This is incredibly useful for starting a discussion on a problem. Much like in the description when creating an issue, you can use Markdown to format text. You can also tag other project members by typing the @ symbol and then their username, or selecting them from the drop-down list that appears. Typing a #, followed by an issue number (or searching in the drop-down box), lets you tag other issues in a comment too. Doing the same with a ! or a $ followed by a number will let you reference Merge Requests or Snippets as well:
Once you submit the comment, ...
