> What certainly is confusing is that the navigation bar at the top > and bottom of > https://lilypond.org/doc/v2.25/Documentation/notation/index.html > contains a link "Index" that points to App D and not to App E. I > just discovered it when writing this email, but it seems like a > "bug" that has existed at least since version 2.14.
AFAIK, this is limitation of `texi2any`; see my report at https://lists.gnu.org/archive/html/bug-texinfo/2025-01/msg00019.html Werner