Using @mentions to notify users
Adding User Mentions
Simply type the @ symbol in a comment for a list of users to appear. You can either finish typing their name, or select them from the list.
A user must be a member of the project that contains the review to be mentioned in a comment.
How Users Are Notified
When a user is mentioned in a comment, they'll receive an email notification:
Clicking the "Open Review" link will load the review with the specific item and on the exact frame where they were mentioned. If the user was tagged in a general (non frame specific) comment, clicking the link will take them to the first frame of the item with the comment.