diff --git a/MANUAL.txt b/MANUAL.txt
index 2c56c623c..b912d6bd1 100644
--- a/MANUAL.txt
+++ b/MANUAL.txt
@@ -4276,8 +4276,8 @@ bibliographies:
 Speaker notes
 -------------
 
-reveal.js has good support for speaker notes.  You can add notes to your
-Markdown document thus:
+Speaker notes are supported in reveal.js and PowerPoint (pptx)
+output. You can add notes to your Markdown document thus:
 
     ::: notes