On 2018-02-11, Michael Welle wrote:
> Looks easy, eh? A header at the top, a footer at the bottom and a lot
> of space in between. In some cases, like in , I wanted content (e.g.
> <p>Ich...<br/>OS/2 Warp 4</p>) to be centered horizontally and
> vertically between the footer and the header.
I created emacs-reveal  for my own slides. Contents are centered
vertically (default for reveal.js). CSS with “text-align: center”
can be used for horizontal alignment.
The howto for emacs-reveal is available at . First-level
headings are centered vertically and horizontally. I just added
slide 20 with horizontally centered text (underneath a heading,
which—as ugly hack—could just be a non-breaking space I guess).
I hope that helps and would be happy to help more. (Responses may
be slow in the coming days, though.)