org: Header and sectioning

 
 12.7.2 Header and sectioning structure
 --------------------------------------
 
 By default, the first three outline levels become headlines, defining a
 general document structure.  Additional levels are exported as ‘itemize’
 or ‘enumerate’ lists.  The transition can also occur at a different
 level (SeeExport settings).
 
    By default, the LaTeX output uses the class ‘article’.
 
    You can change this globally by setting a different value for
 ‘org-latex-default-class’ or locally by adding an option like
 ‘#+LATEX_CLASS: myclass’ in your file, or with a ‘EXPORT_LATEX_CLASS’
 property that applies when exporting a region containing only this
 (sub)tree.  The class must be listed in ‘org-latex-classes’.  This
 variable defines a header template for each class(1), and allows you to
 define the sectioning structure for each class.  You can also define
 your own classes there.
 
    The ‘LATEX_CLASS_OPTIONS’ keyword or ‘EXPORT_LATEX_CLASS_OPTIONS’
 property can specify the options for the ‘\documentclass’ macro.  These
 options have to be provided, as expected by LaTeX, within square
 brackets.
 
    You can also use the ‘LATEX_HEADER’ and ‘LATEX_HEADER_EXTRA’(2)
 keywords in order to add lines to the header.  See the docstring of
 ‘org-latex-classes’ for more information.
 
    An example is shown below.
 
      #+LATEX_CLASS: article
      #+LATEX_CLASS_OPTIONS: [a4paper]
      #+LATEX_HEADER: \usepackage{xyz}
 
      * Headline 1
        some text
 
    ---------- Footnotes ----------
 
    (1) Into which the values of ‘org-latex-default-packages-alist’ and
 ‘org-latex-packages-alist’ are spliced.
 
    (2) Unlike ‘LATEX_HEADER’, contents from ‘LATEX_HEADER_EXTRA’
 keywords will not be loaded when previewing LaTeX snippets (See
 Previewing LaTeX fragments).