Consider offering a GET parameter to activate a 2nd CSS stylesheet, e.g. to customize print output

Example:

Place this in slide HTML head:

<script>
if (window.location.search.indexOf('?print=true') === 0)
    document.write('<link rel="stylesheet" href="slidestyles_print.css" />');
</script>


Add the '?print=true' GET parameter to the slides URL to activate the 2nd CSS.

Write additional styles or overrides to slidestyles_print.css to enhance print / PDF export output.
