In PARM - "Set Course Environment" you can specify a style file for your
course under "Default XML Style File".

For example, the following style file would replace the <h1>-tag in all
incorporated pages by the annoying <blink>-tag:

<definetag name = "h1">
   <meta></meta>
   <render>
      <web><blink></web>
      <tex>\section{</tex>
      <latexsource>\section{</latexsource>  
  </render>
</definetag>


<definetag name = "/h1">
   <meta></meta>
   <render>
      <web></blink></web>
      <tex>}</tex>
      <latexsource>}</latexsource>  
  </render>
</definetag>

For the print target, it would still use \section as <h1>-rendering.

The file extension of a style file is .sty