diff --git a/IPython/frontend/html/notebook/static/js/quickhelp.js b/IPython/frontend/html/notebook/static/js/quickhelp.js
index 3376883..d609e70 100644
--- a/IPython/frontend/html/notebook/static/js/quickhelp.js
+++ b/IPython/frontend/html/notebook/static/js/quickhelp.js
@@ -35,6 +35,7 @@ var IPython = (function (IPython) {
{key: 'Ctrl-m a', help: 'insert cell above'},
{key: 'Ctrl-m b', help: 'insert cell below'},
{key: 'Ctrl-m o', help: 'toggle output'},
+ {key: 'Ctrl-m O', help: 'toggle output scroll'},
{key: 'Ctrl-m l', help: 'toggle line numbers'},
{key: 'Ctrl-m s', help: 'save notebook'},
{key: 'Ctrl-m j', help: 'move cell down'},