Under V9 "Help" was a Item each for "Function Navigator" and "Virtual Book" to find and one could work with it.
Under V10 these Helpers are gone. Although under Documentation/English/System the NoteBook "DocumentationNavigator.nb" can still be found, if even with errors ...
I work with OSX10.9.4, this deficiency is also under Windows, Linux?
Is there a way to revive these functions?
I'm aware of Documentation Center.