diff --git a/README.Rmd b/README.Rmd
index 2ee1375..8193316 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -164,7 +164,7 @@
 (any placeholder content -- replaced automatically)
 ```
 
-To also include the `##` sub-headings below their chapters, add `{data-overview-subheadings=true}` to the heading; the list is then laid out in two columns:
+To also include the `##` sub-headings below their chapters, add `{data-overview-subheadings=true}` to the heading; the list is then laid out in two columns. References and appendix chapters (References/Literatur/Literaturverzeichnis/Appendix/Anhang) are left out, together with their sub-slides.
 
 ``` markdown
 ## Overview {data-overview-subheadings=true}