Those of you who have played Warhammer Online or used addons like nShakeDown know how useful it is to be able to click a single button and immediately see the screen real-estate occupied by all UI components and addons. Unfortunately, WoW's UI does not provide this, and the nShakeDown approach (knowing about every addon out there) tends to fail due the burden on the single addon author keeping everything up to date. It is not meant as a way to open configuration dialog boxes. The purpose is to quickly show and unlock all movable/sizeable frames so the user can arrange them.