After some searching i couldn't find the answer but what I would like to do is the following.
Some of our custom blocks/pages do have some need of explenation in a more general sense (not on field level but more on a integration total overview level). We've created manuals and this describes them in depth. I would like to add those guides to the help menu so my cms-users can look them up very easilly.
If there's no preset functionality I'm thinking of developing a custom menu item for it. But first I like to know your thoughts