gnuplot documentation

180 gnuplot 4.3 77 TERMINAL
The size can be any number between 5.0 and 99.99. If it is omitted, 10.0 is used. It is advisable to use
magstep sizes: 10 times an integer or half-integer power of 1.2, rounded to two decimals, because those
are the most available sizes of fonts in TeX systems.
All the options are optional. If font information is given, it must be at the end, with size (if present)
last. The size is needed to select a size for the font, even if the font name includes size information. For
example, set term mp "cmtt12" selects cmtt12 shrunk to the default size 10. This is probably not
what you want or you would have used cmtt10.
The following common ascii characters need special treatment in TeX:
$, &, #, %, _; |, ; ^, ~, \, {, and }
The five characters $, #, &, , and % can simply be escaped, e.g., \$. The three characters , and
| can be wrapped in math mode, e.g., $