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(gnuplot.info)enhanced postscript

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Enter node , (file) or (file)node

  Control      Examples        Explanation
   ^           a^x             superscript
   _           a_x             subscript
   @           @x or a@^b_c    phantom box (occupies no width)
   &           &{space}        inserts space of specified length

 Braces can be used to place multiple-character text where a single character
 is expected (e.g., 2^{10}).  To change the font and/or size, use the full
 form:  {/[fontname][=fontsize | *fontscale] text}.  Thus {/Symbol=20 G} is a
 20-point GAMMA) and {/*0.75 K} is a K at three-quarters of whatever fontsize
 is currently in effect.  (The '/' character MUST be the first character after
 the '{'.)

 If the encoding vector has been changed by `set encoding` (Note: encoding ),
 the default encoding vector can be used instead by following the slash with a
 dash.  This is unnecessary if you use the Symbol font, however---since /Symbol
 uses its own encoding vector, `gnuplot` (Note: gnuplot ) will not apply any
 other encoding vector to it.

 The phantom box is useful for a@^b_c to align superscripts and subscripts
 but does not work well for overwriting an accent on a letter.  (To do the
 latter, it is much better to use `set encoding iso_8859_1` to change to the
 ISO Latin-1 encoding vector, which contains a large variety of letters with
 accents or other diacritical marks.)  Since the box is non-spacing, it is
 sensible to put the shorter of the subscript or superscript in the box (that
 is, after the @).

 Space equal in length to a string can be inserted using the '&' character.
 Thus
         'abc&{def}ghi'
 would produce
         'abc   ghi'.

 You can access special symbols numerically by specifying \character-code (in
 octal), e.g., {/Symbol \245} is the symbol for infinity.

 You can escape control characters using \, e.g.,  \\, \{, and so on.

 But be aware that strings in double-quotes are parsed differently than those
 enclosed in single-quotes.  The major difference is that backslashes may need
 to be doubled when in double-quoted strings.

 Examples (these are hard to describe in words---try them!):
       set xlabel 'Time (10^6 {/Symbol m}s)'
       set title '{/Symbol=18 \362@_{/=9.6 0}^{/=12 x}} \
                  {/Helvetica e^{-{/Symbol m}^2/2} d}{/Symbol m}'

 The file "ps_guide.ps" in the /docs/ps subdirectory of the `gnuplot` source
 distribution contains more examples of the enhanced syntax.