diff --git a/collects/scribblings/scribble/core.scrbl b/collects/scribblings/scribble/core.scrbl
index a7829786..02148cea 100644
--- a/collects/scribblings/scribble/core.scrbl
+++ b/collects/scribblings/scribble/core.scrbl
@@ -340,10 +340,11 @@ The recognized @tech{style properties} are as follows:
        normally shows only the top-level sections).}
 
  @item{@racket['hidden] --- The part title is not shown in rendered
-       HTML output.}
+       HTML output. The @racket['toc-hidden] style usually should be
+       included with @racket['hidden].}
 
  @item{@racket['toc-hidden] --- The part title is not shown in tables
-       of contents.}
+       of contents, including in ``on this page'' boxes.}
 
  @item{@racket['quiet] --- In HTML output and most other output modes,
        hides entries for sub-parts of this part in a