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latex2e: Sectioning

 
 6 Sectioning
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 Sectioning commands provide the means to structure your text into units:
 
 '\part'
 '\chapter'
      ('report' and 'book' class only)
 '\section'
 '\subsection'
 '\subsubsection'
 '\paragraph'
 '\subparagraph'
 
    All sectioning commands take the same general form, e.g.,
 
      \chapter[TOCTITLE]{TITLE}
 
    In addition to providing the heading TITLE in the main text, the
 section title can appear in two other places:
 
   1. The table of contents.
   2. The running head at the top of the page.
 
    You may not want the same text in these places as in the main text.
 To handle this, the sectioning commands have an optional argument
 TOCTITLE that, when given, specifies the text for these other places.
 
    Also, all sectioning commands have '*'-forms that print TITLE as
 usual, but do not include a number and do not make an entry in the table
 of contents.  For instance:
 
      \section*{Preamble}
 
    The '\appendix' command changes the way following sectional units are
 numbered.  The '\appendix' command itself generates no text and does not
 affect the numbering of parts.  The normal use of this command is
 something like
 
      \chapter{A Chapter}
      ...
      \appendix
      \chapter{The First Appendix}
 
    The 'secnumdepth' counter controls printing of section numbers.  The
 setting
 
      \setcounter{secnumdepth}{LEVEL}
 
 suppresses heading numbers at any depth > LEVEL, where 'chapter' is
 level zero.  (\setcounter.)
 

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