diff --git a/manual/gui.rst b/manual/gui.rst
index d73df07dee..271278cf54 100644
--- a/manual/gui.rst
+++ b/manual/gui.rst
@@ -720,6 +720,8 @@ Calibre has several keyboard shortcuts to save you time and mouse movement. Thes
       - Restart calibre in debug mode
     * - :kbd:`Shift+Ctrl+E`
       - Add empty books to calibre
+    * - :kbd:`Ctrl+M`
+      - Toggle Mark/unmarkes status on selected books
     * - :kbd:`Q`
       - Open the Quick View popup for viewing books in related series/tags/etc.
     * - :kbd:`Shift+Q`