diff --git a/tools/droiddoc/templates-sdk-dev/components/masthead.cs b/tools/droiddoc/templates-sdk-dev/components/masthead.cs
index fc39cf7..d857ffb 100644
--- a/tools/droiddoc/templates-sdk-dev/components/masthead.cs
+++ b/tools/droiddoc/templates-sdk-dev/components/masthead.cs
@@ -1,55 +1,8 @@
 <?cs def:custom_masthead() ?>
-<a name="top"></a>
-
-<!-- dialog to prompt lang pref change when loaded from hardcoded URL
-<div id="langMessage" style="display:none">
-  <div>
-    <div class="lang en">
-      <p>You requested a page in English, would you like to proceed with this language setting?</p>
-    </div>
-    <div class="lang es">
-      <p>You requested a page in Spanish (Español), would you like to proceed with this language setting?</p>
-    </div>
-    <div class="lang ja">
-      <p>You requested a page in Japanese (日本語), would you like to proceed with this language setting?</p>
-    </div>
-    <div class="lang ko">
-      <p>You requested a page in Korean (한국어), would you like to proceed with this language setting?</p>
-    </div>
-    <div class="lang ru">
-      <p>You requested a page in Russian (Русский), would you like to proceed with this language setting?</p>
-    </div>
-    <div class="lang zh-cn">
-      <p>You requested a page in Simplified Chinese (简体中文), would you like to proceed with this language setting?</p>
-    </div>
-    <div class="lang zh-tw">
-      <p>You requested a page in Traditional Chinese (繁體中文), would you like to proceed with this language setting?</p>
-    </div>
-    <a href="#" class="button yes" onclick="return false;">
-      <span class="lang en">Yes</span>
-      <span class="lang es">Sí</span>
-      <span class="lang ja">Yes</span>
-      <span class="lang ko">Yes</span>
-      <span class="lang ru">Yes</span>
-      <span class="lang zh-cn">是的</span>
-      <span class="lang zh-tw">没有</span>
-    </a>
-    <a href="#" class="button" onclick="$('#langMessage').hide();return false;">
-      <span class="lang en">No</span>
-      <span class="lang es">No</span>
-      <span class="lang ja">No</span>
-      <span class="lang ko">No</span>
-      <span class="lang ru">No</span>
-      <span class="lang zh-cn">没有</span>
-      <span class="lang zh-tw">没有</span>
-    </a>
-  </div>
-</div> -->
-
-<?cs if:!devsite ?><?cs # leave out the global header for devsite; it is in devsite template ?>
+  <a name="top"></a>
   <!-- Header -->
   <div id="header-wrapper">
-    <div class="dac-header" id="header"><?cs call:butter_bar() ?>
+    <div class="dac-header <?cs if:ndk ?>dac-ndk<?cs /if ?>" id="header">
       <div class="dac-header-inner">
         <a class="dac-nav-toggle" data-dac-toggle-nav href="javascript:;" title="Open navigation">
           <span class="dac-nav-hamburger">
@@ -58,9 +11,10 @@
             <span class="dac-nav-hamburger-bot"></span>
           </span>
         </a>
-        <?cs if:ndk ?><a class="dac-header-logo" href="<?cs var:toroot ?>ndk/index.html">
-          <img class="dac-header-logo-image" src="<?cs var:toroot ?>assets/images/android_logo_ndk.png"
-              srcset="<?cs var:toroot ?>assets/images/android_logo_ndk@2x.png 2x"
+        <?cs if:ndk ?><a class="dac-header-logo" style="width:144px;" href="<?cs var:toroot
+        ?>ndk/index.html">
+          <img class="dac-header-logo-image" src="<?cs var:toroot ?>assets/images/android_logo.png"
+              srcset="<?cs var:toroot ?>assets/images/android_logo@2x.png 2x"
               width="32" height="36" alt="Android" /> NDK
           </a><?cs else ?><a class="dac-header-logo" href="<?cs var:toroot ?>index.html">
           <img class="dac-header-logo-image" src="<?cs var:toroot ?>assets/images/android_logo.png"
@@ -68,33 +22,80 @@
               width="32" height="36" alt="Android" /> Developers
           </a><?cs /if ?>
 
-        <ul class="dac-header-crumbs">
-          <?cs # More <li> elements added here with javascript ?>
-          <?cs if:!section.landing ?><li class="dac-header-crumbs-item"><span class="dac-header-crumbs-link current <?cs
-            if:ndk ?>ndk<?cs /if ?>"><?cs var:page.title ?></a></li><?cs
-          /if ?>
-        </ul>
-
-        <?cs # ADD SEARCH AND MENU ?>
-        <?cs if:!ndk ?>
-        <?cs call:header_search_widget() ?>
-        <?cs /if ?>
+        <?cs if:ndk
+        ?><ul class="dac-header-tabs">
+          <li>
+            <a href="<?cs var:toroot ?>ndk/guides/index.html" class="dac-header-tab"
+            zh-tw-lang="API 指南"
+            zh-cn-lang="API 指南"
+            ru-lang="Руководства по API"
+            ko-lang="API 가이드"
+            ja-lang="API ガイド"
+            es-lang="Guías de la API">Guides</a>
+          </li>
+          <li>
+            <a href="<?cs var:toroot ?>ndk/reference/index.html" class="dac-header-tab"
+            zh-tw-lang="參考資源"
+            zh-cn-lang="参考"
+            ru-lang="Справочник"
+            ko-lang="참조문서"
+            ja-lang="リファレンス"
+            es-lang="Referencia">Reference</a>
+          </li>
+          <li>
+            <a href="<?cs var:toroot ?>ndk/samples/index.html" class="dac-header-tab"
+           >Samples</a>
+          </li>
+          <li>
+            <a href="<?cs var:toroot ?>ndk/downloads/index.html" class="dac-header-tab"
+            >Downloads</a>
+          </li>
+        </ul><?cs else
+        ?><ul class="dac-header-tabs">
+          <li>
+          <a class="dac-header-tab" href="<?cs var:toroot ?>design/index.html"
+             zh-tw-lang="設計"
+             zh-cn-lang="设计"
+             ru-lang="Проектирование"
+             ko-lang="디자인"
+             ja-lang="設計"
+             es-lang="Diseñar">Design</a>
+          </li>
+          <li>
+          <a class="dac-header-tab" href="<?cs var:toroot ?>develop/index.html"
+             zh-tw-lang="開發"
+             zh-cn-lang="开发"
+             ru-lang="Разработка"
+             ko-lang="개발"
+             ja-lang="開発"
+             es-lang="Desarrollar">Develop</a>
+          </li>
+          <li>
+          <a class="dac-header-tab" href="<?cs var:toroot ?>distribute/index.html"
+             zh-tw-lang="發佈"
+             zh-cn-lang="分发"
+             ru-lang="Распространение"
+             ko-lang="배포"
+             ja-lang="配布"
+             es-lang="Distribuir">Distribute</a>
+          </li>
+        </ul><?cs
+        /if ?>
 
         <?cs if:ndk ?><a class="dac-header-console-btn" href="http://developer.android.com">
-          <span class="dac-visible-desktop-inline">Back to Android Developers</span>
+          Back to Android Developers
         </a><?cs else ?><a class="dac-header-console-btn" href="https://play.google.com/apps/publish/">
           <span class="dac-sprite dac-google-play"></span>
           <span class="dac-visible-desktop-inline">Developer</span>
           Console
         </a><?cs /if ?>
 
+        <?cs # ADD SEARCH AND MENU ?>
+        <?cs if:!ndk ?>
+        <?cs call:header_search_widget() ?>
+        <?cs /if ?>
       </div><!-- end header-wrap.wrap -->
     </div><!-- end header -->
-
-    <div id="searchResults" class="wrap" style="display:none;">
-      <h2 id="searchTitle">Results</h2>
-      <div id="leftSearchControl" class="search-control">Loading...</div>
-    </div>
   </div> <!--end header-wrapper -->
 
   <?cs if:ndk ?>
@@ -102,14 +103,10 @@
   <nav class="dac-nav">
     <div class="dac-nav-dimmer" data-dac-toggle-nav></div>
 
-    <ul class="dac-nav-list" data-dac-nav>
-      <li class="dac-nav-item dac-nav-head">
-        <a class="dac-nav-link dac-nav-logo" data-dac-toggle-nav href="javascript:;" title="Close navigation">
-          <img class="dac-logo-image" src="<?cs var:toroot ?>assets/images/android_logo_ndk.png"
-               srcset="<?cs var:toroot ?>assets/images/android_logo_ndk@2x.png 2x"
-               width="32" height="36" alt="Android" /> NDK
-        </a>
-      </li>
+    <div class="dac-nav-sidebar" data-swap data-dynamic="false" data-transition-speed="300" data-dac-nav>
+                   <div data-swap-container>
+        <?cs call:custom_left_nav() ?>
+      <ul id="dac-main-navigation" class="dac-nav-list dac-swap-section dac-left dac-no-anim">
       <li class="dac-nav-item guides">
         <a class="dac-nav-link" href="<?cs var:toroot ?>ndk/guides/index.html"
            zh-tw-lang="API 指南"
@@ -136,153 +133,159 @@
         <a class="dac-nav-link" href="<?cs var:toroot ?>ndk/downloads/index.html"
            >Downloads</a>
       </li>
-    </ul>
+      </ul>
+    </div>
+                       </div>
   </nav>
   <!-- end NDK navigation-->
+
+
+
   <?cs else ?>
   <!-- Navigation-->
   <nav class="dac-nav">
     <div class="dac-nav-dimmer" data-dac-toggle-nav></div>
 
-    <ul class="dac-nav-list" data-dac-nav>
-      <li class="dac-nav-item dac-nav-head">
-        <a class="dac-nav-link dac-nav-logo" data-dac-toggle-nav href="javascript:;" title="Close navigation">
-          <img class="dac-logo-image" src="<?cs var:toroot ?>assets/images/android_logo.png"
-               srcset="<?cs var:toroot ?>assets/images/android_logo@2x.png 2x"
-               width="32" height="36" alt="Android" /> Developers
-        </a>
-      </li>
-      <li class="dac-nav-item home">
-        <a class="dac-nav-link dac-visible-mobile-block" href="<?cs var:toroot ?>index.html">Home</a>
-        <ul class="dac-nav-secondary about">
-          <li class="dac-nav-item about">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>about/index.html">Android</a>
-          </li>
-          <li class="dac-nav-item wear">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>wear/index.html">Wear</a>
-          </li>
-          <li class="dac-nav-item tv">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>tv/index.html">TV</a>
-          </li>
-          <li class="dac-nav-item auto">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>auto/index.html">Auto</a>
-          </li>
+    <div class="dac-nav-sidebar" data-swap data-dynamic="false" data-transition-speed="300" data-dac-nav>
+      <div data-swap-container>
+        <?cs call:custom_left_nav() ?>
+        <ul id="dac-main-navigation" class="dac-nav-list dac-swap-section dac-left dac-no-anim">
+        <li class="dac-nav-item home">
+          <a class="dac-nav-link" href="<?cs var:toroot ?>index.html">Home</a>
+          <i class="dac-sprite dac-expand-more-black dac-nav-sub-slider"></i>
+          <ul class="dac-nav-secondary about">
+            <li class="dac-nav-item versions">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>about/versions/marshmallow/index.html">Android</a>
+            </li>
+            <li class="dac-nav-item wear">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>wear/index.html">Wear</a>
+            </li>
+            <li class="dac-nav-item tv">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>tv/index.html">TV</a>
+            </li>
+            <li class="dac-nav-item auto">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>auto/index.html">Auto</a>
+            </li>
+          </ul>
+        </li>
+        <li class="dac-nav-item design">
+          <a class="dac-nav-link" href="<?cs var:toroot ?>design/index.html"
+             zh-tw-lang="設計"
+             zh-cn-lang="设计"
+             ru-lang="Проектирование"
+             ko-lang="디자인"
+             ja-lang="設計"
+             es-lang="Diseñar">Design</a>
+        </li>
+        <li class="dac-nav-item develop">
+          <a class="dac-nav-link" href="<?cs var:toroot ?>develop/index.html"
+             zh-tw-lang="開發"
+             zh-cn-lang="开发"
+             ru-lang="Разработка"
+             ko-lang="개발"
+             ja-lang="開発"
+             es-lang="Desarrollar">Develop</a>
+          <i class="dac-sprite dac-expand-more-black dac-nav-sub-slider"></i>
+          <ul class="dac-nav-secondary develop">
+            <li class="dac-nav-item training">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>training/index.html"
+                 zh-tw-lang="訓練課程"
+                 zh-cn-lang="培训"
+                 ru-lang="Курсы"
+                 ko-lang="교육"
+                 ja-lang="トレーニング"
+                 es-lang="Capacitación">Training</a>
+            </li>
+            <li class="dac-nav-item guide">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>guide/index.html"
+                 zh-tw-lang="API 指南"
+                 zh-cn-lang="API 指南"
+                 ru-lang="Руководства по API"
+                 ko-lang="API 가이드"
+                 ja-lang="API ガイド"
+                 es-lang="Guías de la API">API Guides</a>
+            </li>
+            <li class="dac-nav-item reference">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>reference/packages.html"
+                 zh-tw-lang="參考資源"
+                 zh-cn-lang="参考"
+                 ru-lang="Справочник"
+                 ko-lang="참조문서"
+                 ja-lang="リファレンス"
+                 es-lang="Referencia">Reference</a>
+            </li>
+            <li class="dac-nav-item tools">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>sdk/index.html"
+                 zh-tw-lang="相關工具"
+                 zh-cn-lang="工具"
+                 ru-lang="Инструменты"
+                 ko-lang="도구"
+                 ja-lang="ツール"
+                 es-lang="Herramientas">Tools</a></li>
+            <li class="dac-nav-item google">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>google/index.html">Google Services</a>
+            </li>
+            <?cs if:android.hasSamples ?>
+            <li class="dac-nav-item samples">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>samples/index.html">Samples</a>
+            </li>
+            <?cs /if ?>
+          </ul>
+        </li>
+        <li class="dac-nav-item distribute">
+          <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/<?cs if:android.whichdoc == 'offline' ?>googleplay/<?cs /if ?>index.html"
+             zh-tw-lang="發佈"
+             zh-cn-lang="分发"
+             ru-lang="Распространение"
+             ko-lang="배포"
+             ja-lang="配布"
+             es-lang="Distribuir">Distribute</a>
+          <i class="dac-sprite dac-expand-more-black dac-nav-sub-slider"></i>
+          <ul class="dac-nav-secondary distribute">
+            <li class="dac-nav-item googleplay">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/googleplay/index.html">Google Play</a></li>
+            <li class="dac-nav-item essentials">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/essentials/index.html">Essentials</a></li>
+            <li class="dac-nav-item users">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/users/index.html">Get Users</a></li>
+            <li class="dac-nav-item engage">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/engage/index.html">Engage &amp; Retain</a></li>
+            <li class="dac-nav-item monetize">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/monetize/index.html">Earn</a>
+            </li>
+            <li class="dac-nav-item analyze">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/analyze/index.html">Analyze</a>
+            </li>
+            <li class="dac-nav-item stories">
+              <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/stories/index.html">Stories</a>
+            </li>
+          </ul>
+        </li>
         </ul>
-      </li>
-      <li class="dac-nav-item design">
-        <a class="dac-nav-link" href="<?cs var:toroot ?>design/index.html"
-           zh-tw-lang="設計"
-           zh-cn-lang="设计"
-           ru-lang="Проектирование"
-           ko-lang="디자인"
-           ja-lang="設計"
-           es-lang="Diseñar">Design</a>
-      </li>
-      <li class="dac-nav-item develop">
-        <a class="dac-nav-link" href="<?cs var:toroot ?>develop/index.html"
-           zh-tw-lang="開發"
-           zh-cn-lang="开发"
-           ru-lang="Разработка"
-           ko-lang="개발"
-           ja-lang="開発"
-           es-lang="Desarrollar">Develop</a>
-        <ul class="dac-nav-secondary develop">
-          <li class="dac-nav-item training">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>training/index.html"
-               zh-tw-lang="訓練課程"
-               zh-cn-lang="培训"
-               ru-lang="Курсы"
-               ko-lang="교육"
-               ja-lang="トレーニング"
-               es-lang="Capacitación">Training</a>
-          </li>
-          <li class="dac-nav-item guide">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>guide/index.html"
-               zh-tw-lang="API 指南"
-               zh-cn-lang="API 指南"
-               ru-lang="Руководства по API"
-               ko-lang="API 가이드"
-               ja-lang="API ガイド"
-               es-lang="Guías de la API">API Guides</a>
-          </li>
-          <li class="dac-nav-item reference">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>reference/packages.html"
-               zh-tw-lang="參考資源"
-               zh-cn-lang="参考"
-               ru-lang="Справочник"
-               ko-lang="참조문서"
-               ja-lang="リファレンス"
-               es-lang="Referencia">Reference</a>
-          </li>
-          <li class="dac-nav-item tools">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>sdk/index.html"
-               zh-tw-lang="相關工具"
-               zh-cn-lang="工具"
-               ru-lang="Инструменты"
-               ko-lang="도구"
-               ja-lang="ツール"
-               es-lang="Herramientas">Tools</a></li>
-          <li class="dac-nav-item google">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>google/index.html">Google Services</a>
-          </li>
-          <?cs if:android.hasSamples ?>
-          <li class="dac-nav-item samples">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>samples/index.html">Samples</a>
-          </li>
-          <?cs /if ?>
-        </ul>
-      </li>
-      <li class="dac-nav-item distribute">
-        <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/<?cs if:android.whichdoc == 'offline' ?>googleplay/<?cs /if ?>index.html"
-           zh-tw-lang="發佈"
-           zh-cn-lang="分发"
-           ru-lang="Распространение"
-           ko-lang="배포"
-           ja-lang="配布"
-           es-lang="Distribuir">Distribute</a>
-        <ul class="dac-nav-secondary distribute">
-          <li class="dac-nav-item googleplay">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/googleplay/index.html">Google Play</a></li>
-          <li class="dac-nav-item essentials">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/essentials/index.html">Essentials</a></li>
-          <li class="dac-nav-item users">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/users/index.html">Get Users</a></li>
-          <li class="dac-nav-item engage">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/engage/index.html">Engage &amp; Retain</a></li>
-          <li class="dac-nav-item monetize">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/monetize/index.html">Earn</a>
-          </li>
-          <li class="dac-nav-item analyze">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/analyze/index.html">Analyze</a>
-          </li>
-          <li class="dac-nav-item stories">
-            <a class="dac-nav-link" href="<?cs var:toroot ?>distribute/stories/index.html">Stories</a>
-          </li>
-        </ul>
-      </li>
-    </ul>
+      </div>
+    </div>
   </nav>
   <!-- end navigation-->
   <?cs /if ?>
-<?cs /if ?><?cs # end if/else !devsite ?>
+
+<!-- Nav Setup -->
+<script>$('[data-dac-nav]').dacNav();</script>
 
 <?cs
 /def ?><?cs # end custom_masthead() ?>
 
 
-<?cs # (UN)COMMENT THE INSIDE OF THIS METHOD TO TOGGLE VISIBILITY ?>
-<?cs def:butter_bar() ?>
+<?cs def:toast() ?>
 
-<?cs # HIDE THE BUTTER BAR
+  <?cs # (UN)COMMENT TO TOGGLE VISIBILITY
 
-    <div style="height:20px"><!-- spacer to bump header down --></div>
-    <div id="butterbar-wrapper">
-      <div id="butterbar">
-        <a href="http://googleblog.blogspot.com/" id="butterbar-message">
-          The Android 5.0 SDK will be available on October 17th!
-        </a>
+  <div class="dac-toast-group">
+    <div class="dac-toast" data-toast>
+      <div class="dac-toast-wrap">
+        This is a demo notification <a href="#">Learn more</a>.
       </div>
     </div>
+  </div>
 
 ?>