"lost, stolen or strayed" – that handy list of paragraph styles

There has undoubtedly been a time when my FM 2012 workspace included a nifty option for a list of 'styles defined in document' that made it easy to weed out unwanted definitions. Sometime since, this option has mysteriously vanished; and I cannot retrieve the same functionality from the menus: how do I get it back? Hints and tips welcome!