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(emacs)TeX Mode

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TeX Mode
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   TeX is a powerful text formatter written by Donald Knuth; it is also
free, like GNU Emacs.  LaTeX is a simplified input format for TeX,
implemented by TeX macros; it comes with TeX.  SliTeX is a special form
of LaTeX.(1)

   Emacs has a special TeX mode for editing TeX input files.  It
provides facilities for checking the balance of delimiters and for
invoking TeX on all or part of the file.

   TeX mode has three variants, Plain TeX mode, LaTeX mode, and SliTeX
mode (these three distinct major modes differ only slightly).  They are
designed for editing the three different formats.  The command `M-x
tex-mode' looks at the contents of the buffer to determine whether the
contents appear to be either LaTeX input or SliTeX input; if so, it
selects the appropriate mode.  If the file contents do not appear to be
LaTeX or SliTeX, it selects Plain TeX mode.  If the contents are
insufficient to determine this, the variable `tex-default-mode'
controls which mode is used.

   When `M-x tex-mode' does not guess right, you can use the commands
`M-x plain-tex-mode', `M-x latex-mode', and `M-x slitex-mode' to select
explicitly the particular variants of TeX mode.

Editing

TeX Editing. Special commands for editing in TeX mode.

LaTeX

LaTeX Editing. Additional commands for LaTeX input files.

Printing

TeX Print. Commands for printing part of a file with TeX.

Misc

TeX Misc. Customization of TeX mode, and related features.

   ---------- Footnotes ----------

   (1) SliTeX is obsoleted by the `slides' document class in recent
LaTeX versions.