@top GNU LilyPond --- program usage
@c HJJ: Info needs `@top', which is a synonym for `@unnumbered' in TeX.
-This is the program usage manual for GNU LilyPond version @version{}.
+This is the Application Usage (AU) manual for GNU LilyPond version @version{}.
+For more information about how this fits with the other
+documentation, see @rlearning{About the documentation}.
@cindex web site
@cindex URL