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.
 }
 
 }