There are several goodies which make PLies (from version 1.6) even
beter than plain html:
- keyboard navigation (using space or n for next slide
and back space or b for previous slide and t for
table of contents.
- support for class="delayed" which will be displayed after user
press space on slide (to support showing of content one-by-one)
- support for site navigation (using link ref=)
- support for arbitrary perl code inside presentation using
<perl>...</perl> tag (which can be used to create
graphs as in history page)
