The reviewer can then respond to the invitation. If you want to invite a reviewer from outside the reviewer pool, you can do so by searching for their email address or profileID in the search bar of the second column and clicking 'Invite Assignment'. If they are in conflict with that paper, a banner will alert you with an error. Otherwise, they will receive an email notifying them of their invitation with the option to accept or reject the assignment. Their status will change according to their response to your invitation ('Declined', 'Pending Sign Up', 'Accepted', or 'Conflict Detected').