diff --git a/test/examples.html b/test/examples.html
index 7e637145e..484c07e33 100644
--- a/test/examples.html
+++ b/test/examples.html
@@ -3,6 +3,9 @@
 <head>
 <title>MathJax Example Page</title>
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
+
 <style>
 li {margin-top: .2em}
 </style>
diff --git a/test/index-images.html b/test/index-images.html
index d66cfd0f8..89ac1fc62 100644
--- a/test/index-images.html
+++ b/test/index-images.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2009-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/x-mathjax-config">
 //
diff --git a/test/index.html b/test/index.html
index e5f081738..5721fcf5a 100644
--- a/test/index.html
+++ b/test/index.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2009-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/x-mathjax-config">
 //
diff --git a/test/localization.html b/test/localization.html
index 11ce309ed..143812646 100644
--- a/test/localization.html
+++ b/test/localization.html
@@ -3,7 +3,9 @@
 <head>
 <title>Localization</title>
 <!-- Copyright (c) 2013-2015 The MathJax Consortium -->
-<meta charset="utf-8"/>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
+
 <script type="text/javascript" src="../unpacked/MathJax.js?config=TeX-MML-AM_HTMLorMML-full.js">
   var _M_ = 'MISSING TRANSLATION';
 </script>
diff --git a/test/sample-all-at-once.html b/test/sample-all-at-once.html
index 8099cc1e9..c7b9483b3 100644
--- a/test/sample-all-at-once.html
+++ b/test/sample-all-at-once.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <!--
  |
diff --git a/test/sample-asciimath.html b/test/sample-asciimath.html
index 0f7c85a0e..e6724aa84 100644
--- a/test/sample-asciimath.html
+++ b/test/sample-asciimath.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/javascript" src="../MathJax.js?config=AM_HTMLorMML-full"></script>
 
diff --git a/test/sample-autoload.html b/test/sample-autoload.html
index 6d74a05b5..8611bb66e 100644
--- a/test/sample-autoload.html
+++ b/test/sample-autoload.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <!--
  |
diff --git a/test/sample-dynamic-2.html b/test/sample-dynamic-2.html
index 77058e56c..4bb3e74f2 100644
--- a/test/sample-dynamic-2.html
+++ b/test/sample-dynamic-2.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/x-mathjax-config">
   MathJax.Hub.Config({
@@ -12,7 +13,7 @@
     tex2jax: { inlineMath: [['$','$'],['\\(','\\)']] }
   });
 </script>
-<script type="text/javascript" src="../MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
+<script type="text/javascript" src="../MathJax.js?config=TeX-MML-AM_HTMLorMML"></script>
 
 <script>
 var Preview = {
@@ -105,12 +106,19 @@ Preview.callback.autoReset = true;  // make sure it can run more than once
 </head>
 <body>
 
-Type text in the box below:<br/>
+<p> Type text (mixed with MathML, TeX or asciimath) in the box below for a live preview.</p>
 
 <textarea id="MathInput" cols="60" rows="10" onkeyup="Preview.Update()" style="margin-top:5px">
 </textarea>
-<br/><br/>
-Preview is shown here:
+<p>Configured delimiters: 
+<ul>
+<li>TeX, inline mode: <code>\(...\)</code> or <code>$...$</code></li>
+<li>TeX, display mode: <code>\[...\]</code> or <code> $$...$$</code></li>
+<li>Asciimath: <code>`...`</code>.</li>
+</ul>
+</p>
+
+<p>Preview is shown here:</p>
 <div id="MathPreview" style="border:1px solid; padding: 3px; width:50%; margin-top:5px"></div>
 <div id="MathBuffer" style="border:1px solid; padding: 3px; width:50%; margin-top:5px; 
 visibility:hidden; position:absolute; top:0; left: 0"></div>
diff --git a/test/sample-dynamic-steps.html b/test/sample-dynamic-steps.html
index be6998fae..58403f2f3 100644
--- a/test/sample-dynamic-steps.html
+++ b/test/sample-dynamic-steps.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2011-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/x-mathjax-config">
   //
diff --git a/test/sample-dynamic.html b/test/sample-dynamic.html
index f932cc0c2..5fbb007cc 100644
--- a/test/sample-dynamic.html
+++ b/test/sample-dynamic.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2010-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/javascript" src="../MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
 
diff --git a/test/sample-eqnum.html b/test/sample-eqnum.html
index c0d2f9fc5..2708d8c75 100644
--- a/test/sample-eqnum.html
+++ b/test/sample-eqnum.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/x-mathjax-config">
   MathJax.Hub.Config({ TeX: { equationNumbers: {autoNumber: "AMS"} } });
diff --git a/test/sample-eqrefs.html b/test/sample-eqrefs.html
index 1f9087c30..f0b9b7a86 100644
--- a/test/sample-eqrefs.html
+++ b/test/sample-eqrefs.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/x-mathjax-config">
   MathJax.Hub.Config({ TeX: { equationNumbers: {autoNumber: "all"} } });
diff --git a/test/sample-loader-config.html b/test/sample-loader-config.html
index 8925bd62c..0c6fd6f7e 100644
--- a/test/sample-loader-config.html
+++ b/test/sample-loader-config.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/javascript">
 //
diff --git a/test/sample-loader.html b/test/sample-loader.html
index 01d631cb1..e83b3d5d0 100644
--- a/test/sample-loader.html
+++ b/test/sample-loader.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/javascript">
 //
diff --git a/test/sample-macros.html b/test/sample-macros.html
index ed2879e42..36d501305 100644
--- a/test/sample-macros.html
+++ b/test/sample-macros.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2012-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <!--
  |
diff --git a/test/sample-mediawiki-texvc.html b/test/sample-mediawiki-texvc.html
index cba236b37..31b4ad8f6 100644
--- a/test/sample-mediawiki-texvc.html
+++ b/test/sample-mediawiki-texvc.html
@@ -4,6 +4,8 @@
     <title>texvc extension</title>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    
     <script type="text/x-mathjax-config">
 MathJax.Hub.Config({
     TeX: { extensions: ["mediawiki-texvc.js"] },
diff --git a/test/sample-mml.html b/test/sample-mml.html
index 9d0919f1b..186295b18 100644
--- a/test/sample-mml.html
+++ b/test/sample-mml.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2010-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/javascript" src="../MathJax.js?config=MML_HTMLorMML-full"></script>
 
diff --git a/test/sample-signals.html b/test/sample-signals.html
index 07e66e9ac..7c0bbb36d 100644
--- a/test/sample-signals.html
+++ b/test/sample-signals.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2010-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <!--
  | This example shows how to use MathJax's signal mechanism to find out 
diff --git a/test/sample-tex.html b/test/sample-tex.html
index 14a312f19..389e3130b 100644
--- a/test/sample-tex.html
+++ b/test/sample-tex.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2010-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/x-mathjax-config">
   MathJax.Hub.Config({
diff --git a/test/sample.html b/test/sample.html
index 415b4873b..3f577a261 100644
--- a/test/sample.html
+++ b/test/sample.html
@@ -5,6 +5,7 @@
 <!-- Copyright (c) 2009-2015 The MathJax Consortium -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+<meta name="viewport" content="width=device-width, initial-scale=1">
 
 <script type="text/x-mathjax-config">
   MathJax.Hub.Config({
