diff --git a/collects/scribblings/drracket/keybindings.scrbl b/collects/scribblings/drracket/keybindings.scrbl
index ced44296b8..e7a969da39 100644
--- a/collects/scribblings/drracket/keybindings.scrbl
+++ b/collects/scribblings/drracket/keybindings.scrbl
@@ -187,6 +187,8 @@ selected.
                                       (list @litchar{║  ║  ║})
                                       (list @litchar{╚══╩══╝}))]
                        }
+@keybinding["C-x r c"]{Centers the contents of the current line inside the enclosing
+                       cell of the enclosing ASCII art rectangle.}
 ]
 
 @section{File Operations}