1 files changed, 5 insertions, 1 deletions

diff --git a/lisp/emulation/cua-base.el b/lisp/emulation/cua-base.el
index fd5249fed1a..aed63ef902f 100644
--- a/lisp/emulation/cua-base.el
+++ b/lisp/emulation/cua-base.el
@@ -1393,7 +1393,11 @@ options:
 
 You can customize `cua-enable-cua-keys' to completely disable the
 CUA bindings, or `cua-prefix-override-inhibit-delay' to change
-the prefix fallback behavior."
+the prefix fallback behavior.
+
+CUA enables `transient-mark-mode' to highlight the region; if you
+only want to highlight the region when it is selected using a
+shifted movement key, set `cua-highlight-region-shift-only'."
   :global t
   :group 'cua
   :set-after '(cua-enable-modeline-indications cua-rectangle-modifier-key)