Fixes #11756: Mention document mode checking ability in IE comaptibility modes

getting-started.html

@@ -805,7 +805,8 @@ bootstrap/
 {% highlight html %}
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 {% endhighlight %}
-    <p>This tag is included in all docs pages and examples to ensure the best rendering possible in each supported version of Internet Explorer.</p>
+    <p>Confirm the document mode by opening the debugging tools: press <kbd>F12</kbd> and check the "Document Mode".</p>
+    <p>This tag is included in all Bootstrap's documentation and examples to ensure the best rendering possible in each supported version of Internet Explorer.</p>
     <p>See <a href="http://stackoverflow.com/questions/6771258/whats-the-difference-if-meta-http-equiv-x-ua-compatible-content-ie-edge">this StackOverflow question</a> for more information.</p>
 
     <h3 id="ie-10-width">Internet Explorer 10 in Windows 8 and Windows Phone 8</h3>