As a Yahoo Group Moderator, how can I appoint someone else as the Moderator as well?

I have done a search but I just can't find the add moderator link under my members' profile. Image here: a href="http://i190.photobucket.com/albums/z38/tkc2007/yahoo-group.gif" rel="nofollow"http://i190.photobucket.com/albums/z38/t…/a