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/README.Rmd b/README.Rmd
index 8193316..8c64a12 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -111,6 +111,8 @@
On mobile browsers (touch devices), a speech-bubble button next to the fullscreen button overlays the current slide with its speaker notes -- useful for practicing a talk on a phone or tablet, where the separate speaker view window of the `'s'` shortcut is awkward. The overlay shows the slide title, its planned time (if annotated with a timing comment), and the notes, and follows along as you change slides. It appears only if the deck contains notes at all.
+- `'r'` toggle the transcript view: a single scrollable page containing every slide's content and speaker notes, so text-to-speech ("read aloud") browser extensions can read the whole presentation -- they cannot walk a reveal.js deck themselves, since hidden slides are not part of the visible page text
+
- `'m'` enable menu mode when the 'menu' plugin is activated
Pressing `Esc` exits all of these modes.