diff --git a/lisp/isearch.el b/lisp/isearch.el
index fbc62e87398..e1903367bae 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -447,6 +447,10 @@ Type \\[isearch-quote-char] to quote control character to search for it.
 \\[isearch-abort] when search is successful aborts and moves point to\
  starting point.
 
+Type \\[isearch-toggle-case-fold] to toggle search case-sensitivity.
+Type \\[isearch-toggle-regexp] to toggle regular-expression mode.
+Type \\[isearch-edit-string] to edit the search string in the minibuffer.
+
 Also supported is a search ring of the previous 16 search strings.
 Type \\[isearch-ring-advance] to search for the next item in the search ring.
 Type \\[isearch-ring-retreat] to search for the previous item in the search\