## 1.52.60 preamble

    set preamble <text>

The setting `preamble` changes the text of the preamble that is passed to latex prior to the rendering of each text item on the current multiplot canvas. This allows, for example, different packages to be loaded by default and user-defined macros to be set up, as in the examples:

    set preamble \usepackage{marvosym}
    set preamble \def\degrees{$^\circ$}