This invokes the KDE help system starting at the KBlackbox help pages (this document).
This changes the mouse cursor to a combination arrow and question mark. Clicking on items within KBlackbox with this arrow will open a help window (if one exists for the particular item) explaining the item's function.
Report a bug or a wishlist item to KBlackbox's authors.
This will displays version and author information
This displays the KDE version and other basic information.