In order to simplify understanding and configuration of Monitor extension, I made these (backwards-incompatible) changes: - remove a bunch of add*Monitor functions - added some new, so now monitor can be configured using three steps: 1. Define Monitor record. 'monitor' can be used as a template, so if you don't need some features (opacity, named monitors) or you're ok with default values you may not define corresponding fields (or even know about them). clock = monitor { prop = ClassName "Cairo-clock" `And` Title "MacSlow's Cairo-Clock" , rect = (Rectangle (1280-150) (800-150) 150 150) , persistent = True , opacity = 0xAAAAAAAA } 2. Add ManageHook to de-manage monitor windows and apply opacity settings. manageHook = myManageHook <+> manageMonitor clock 3. Apply layout modifier. myLayouts = ModifiedLayout clock $ ... Please see updated documentation for details. To users who have already configured their monitors: all you need to change is layout (define monitor and use ModifiedLayout instead of addMonitor). You may leave manageHook as it is and it will work. So conversion should be pretty easy. Sorry for the inconvenience. -- Roman I. Cheplyaka (aka Feuerbach @ IRC)