The text command can straightforwardly be used to render simple one-line LaTeX strings, but sometimes the need arises to place more substantial blocks of text onto a plot. For this purpose, it can be useful to use the LaTeX parbox or minipage environments1. For example:
text '\parbox[t]{6cm}{\setlength{\parindent}{1cm} \ \noindent There once was a lady from Hyde, \newline \ Who ate a green apple and died, \newline \ \indent While her lover lamented, \newline \ \indent The apple fermented, \newline \ and made cider inside her inside.}'
If unusual mathematical symbols are required, for example those in the amsmath package, such a package can be loaded using the set preamble command. For example:
set preamble \usepackage{marvosym} text "{\Huge\Dontwash\ \NoIroning\ \NoTumbler}$\;$ Do not \ wash, iron or tumble-dry this plot."