add transcript view ('r') for text-to-speech read-aloud extensions
Read-aloud browser extensions cannot walk a reveal.js deck: slides
outside the current one are display:none and the visible page text is
indexed only once at page load, so such extensions stop after the title
slide. Pressing 'r' now toggles a transcript view -- a single scrollable
page containing every slide's content and speaker notes (overview TOC
lists excluded, fragments shown, rebuilt on every open) -- which
extensions can read from start to finish. Styled in the ids theme;
closes on click or Escape.
Change-Id: Ia3df9dfa68b9699d318d747831ac8a0e270c8271
diff --git a/man/revealjs_presentation.Rd b/man/revealjs_presentation.Rd
index a903d31..f0b82b4 100644
--- a/man/revealjs_presentation.Rd
+++ b/man/revealjs_presentation.Rd
@@ -183,6 +183,12 @@
title and, if present, the planned time from a timing comment), which is
useful for practicing a talk on a phone or tablet. It follows along as
you change slides and only appears if the deck contains notes at all.
+
+Pressing \code{r} toggles a transcript view: a single scrollable page
+containing every slide's content and speaker notes. Text-to-speech
+("read aloud") browser extensions cannot walk a reveal.js deck, since
+hidden slides are not part of the visible page text -- the transcript
+gives them something they can read from start to finish.
}
}