@unnumbered, @appendix: Chapters with Other Labeling ¶Use the @unnumbered command to start a chapter-level element
that appears without chapter numbers of any kind. Use the
@appendix command to start an appendix that is labeled by
letter (‘A’, ‘B’, …) instead of by number; appendices are also
at the chapter level of structuring.
Write an @appendix or @unnumbered command at the
beginning of a line and follow it on the same line by the title,
just as with @chapter.
Texinfo also provides a command @centerchap, which is analogous
to @unnumbered, but centers its argument in the printed and HTML
outputs. This kind of stylistic choice is not usually offered by
Texinfo.
You are recommended not to use this command, as
it may be removed in future releases of Texinfo.
With @unnumbered, if the name of the associated node is one of
these English words (case-insensitive):
Acknowledgements Colophon Dedication Preface
then the DocBook output uses corresponding special tags
(<preface>, etc.) instead of the default <chapter>.
The argument to @unnumbered itself can be anything, and is
output as the element title as usual.