diff --git a/IPython/html/static/base/less/page.less b/IPython/html/static/base/less/page.less
index ea1dd33..0e0ef4d 100644
--- a/IPython/html/static/base/less/page.less
+++ b/IPython/html/static/base/less/page.less
@@ -81,3 +81,10 @@ span#login_widget {
 .modal-body {
   max-height: 500px;
 }
+
+@media (min-width: 768px) {
+  .modal {
+      width: 700px;
+      margin-left: -350px;
+  }
+}
diff --git a/IPython/html/static/notebook/js/keyboardmanager.js b/IPython/html/static/notebook/js/keyboardmanager.js
index 5479609..28e4e14 100644
--- a/IPython/html/static/notebook/js/keyboardmanager.js
+++ b/IPython/html/static/notebook/js/keyboardmanager.js
@@ -141,7 +141,7 @@ var IPython = (function (IPython) {
                 }
             }
         },
-        'alt--' : {
+        'ctrl-shift--' : {
             help    : 'split cell',
             help_index : 'ea',
             handler : function (event) {
@@ -149,7 +149,7 @@ var IPython = (function (IPython) {
                 return false;
             }
         },
-        'alt-subtract' : {
+        'ctrl-shift-subtract' : {
             help    : '',
             help_index : 'eb',
             handler : function (event) {
diff --git a/IPython/html/static/notebook/js/quickhelp.js b/IPython/html/static/notebook/js/quickhelp.js
index 84f825f..8f2e8f7 100644
--- a/IPython/html/static/notebook/js/quickhelp.js
+++ b/IPython/html/static/notebook/js/quickhelp.js
@@ -109,8 +109,8 @@ var IPython = (function (IPython) {
         var i, half, n;
         var div = $('<div/>').append($(title));
         var sub_div = $('<div/>').addClass('hbox');
-        var col1 = $('<div/>').addClass('box-flex0');
-        var col2 = $('<div/>').addClass('box-flex0');
+        var col1 = $('<div/>').addClass('box-flex1');
+        var col2 = $('<div/>').addClass('box-flex1');
         n = shortcuts.length;
         half = ~~(n/2);  // Truncate :)
         for (i=0; i<half; i++) { col1.append( build_one(shortcuts[i]) ); }
diff --git a/IPython/html/static/notebook/less/quickhelp.less b/IPython/html/static/notebook/less/quickhelp.less
index f57c38e..be4213e 100644
--- a/IPython/html/static/notebook/less/quickhelp.less
+++ b/IPython/html/static/notebook/less/quickhelp.less
@@ -1,11 +1,15 @@
+.quickhelp {
+    .hbox();
+}
 .shortcut_key {
     display: inline-block;
-    width: 16ex;
+    width: 20ex;
     text-align: right;
     font-family: @monoFontFamily;
 }
 
 .shortcut_descr {
     display: inline-block;
+    .box-flex1();
 }
 
diff --git a/IPython/html/static/style/style.min.css b/IPython/html/static/style/style.min.css
index b1796b9..3c01e1d 100644
--- a/IPython/html/static/style/style.min.css
+++ b/IPython/html/static/style/style.min.css
@@ -1303,7 +1303,7 @@ span#login_widget{float:right}
 .navbar-nobg{background-color:transparent;background-image:none}
 #header>span{margin-top:10px}
 .modal-body{max-height:500px}
-.center-nav{display:inline-block;margin-bottom:-4px}
+@media (min-width:768px){.modal{width:700px;margin-left:-350px}}.center-nav{display:inline-block;margin-bottom:-4px}
 .alternate_upload{background-color:none;display:inline}
 .alternate_upload.form{padding:0;margin:0}
 .alternate_upload input.fileinput{background-color:#f00;position:relative;opacity:0;z-index:2;width:295px;margin-left:163px;cursor:pointer;height:26px}
@@ -1516,8 +1516,9 @@ ul#help_menu li a{overflow:hidden;padding-right:2.2em}ul#help_menu li a i{margin
 div#pager_splitter{height:8px}
 #pager-container{position:relative;padding:15px 0}
 div#pager{font-size:14px;line-height:20px;overflow:auto;display:none}div#pager pre{font-size:13px;line-height:1.21429em;color:#000;background-color:#f7f7f7;padding:.4em}
-.shortcut_key{display:inline-block;width:16ex;text-align:right;font-family:monospace}
-.shortcut_descr{display:inline-block}
+.quickhelp{display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch}
+.shortcut_key{display:inline-block;width:20ex;text-align:right;font-family:monospace}
+.shortcut_descr{display:inline-block;-webkit-box-flex:1;-moz-box-flex:1;box-flex:1;flex:1}
 span#save_widget{padding:0 5px;margin-top:12px}
 span#checkpoint_status,span#autosave_status{font-size:small}
 @media (max-width:767px){span#save_widget{font-size:small} span#checkpoint_status,span#autosave_status{font-size:x-small}}@media (max-width:767px){span#checkpoint_status,span#autosave_status{display:none}}@media (min-width:768px) and (max-width:979px){span#checkpoint_status{display:none} span#autosave_status{font-size:x-small}}.toolbar{padding:0 10px;margin-top:-5px}.toolbar select,.toolbar label{width:auto;height:26px;vertical-align:middle;margin-right:2px;margin-bottom:0;display:inline;font-size:92%;margin-left:.3em;margin-right:.3em;padding:0;padding-top:3px}