Doc change: update logo for samples, several edits.

Change-Id: I9045f51578f211301a5feb20423b4aa3a5fa2d94
diff --git a/docs/html/preview/api-overview.jd b/docs/html/preview/api-overview.jd
index bf5eec4..4a7845b 100644
--- a/docs/html/preview/api-overview.jd
+++ b/docs/html/preview/api-overview.jd
@@ -17,10 +17,10 @@
 <ol id="toc44" class="hide-nested">
   <li><a href="#backup">Automatic App Data Backup</a></li>
   <li><a href="#authentication">Authentication</a>
-    <ul>
+    <ol>
       <li><a href="#fingerprint-authentication">Fingerprint Authentication</a></li>
       <li><a href="#confirm-credentials">Confirm Credentials</a></li>
-    </ul>
+    </ol>
   </li>
   <li><a href="#direct-share">Direct Share</a></li>
   <li><a href="#voice-interactions">Voice Interactions</a></li>
@@ -34,10 +34,10 @@
   <li><a href="#audio">Audio Features</a></li>
   <li><a href="#video">Video Features</a></li>
   <li><a href="#camera">Camera Features</a>
-    <ul>
+    <ol>
       <li><a href="#flashlight">Flashlight API</a></li>
       <li><a href="#reprocessing">Camera Reprocessing</a></li>
-    </ul>
+    </ol>
   </li>
   <li><a href="#afw">Android for Work Features</a></li>
 </ol>
diff --git a/docs/html/preview/features/runtime-permissions.jd b/docs/html/preview/features/runtime-permissions.jd
index 9994120..fa7a12b 100644
--- a/docs/html/preview/features/runtime-permissions.jd
+++ b/docs/html/preview/features/runtime-permissions.jd
@@ -1,6 +1,7 @@
 page.title=Permissions
 page.tags=previewresources, androidm
 page.keywords=permissions, runtime, preview
+page.image=images/permissions_check.png
 @jd:body
 
 
diff --git a/docs/html/preview/index.jd b/docs/html/preview/index.jd
index c5644cc..7cc75a0 100644
--- a/docs/html/preview/index.jd
+++ b/docs/html/preview/index.jd
@@ -19,8 +19,8 @@
         <h1 class="dac-hero-title">Android M Developer Preview</h1>
         <p class="dac-hero-description">
           Get ready for the next version of Android. Test your apps on Nexus 5, 6, 9, and
-          Player. Explore what's new &mdash; a <strong>runtime permissions</strong> model,
-          power-saving <strong>Doze</strong> and <strong>Standby Mode</strong>, new
+          Player. Explore what's new &mdash; <strong>runtime permissions</strong>,
+          <strong>Doze</strong> and <strong>App Standby</strong> power-saving features, new
           <strong>assist technology</strong>, and more.
         </p>
 
diff --git a/docs/html/preview/overview.jd b/docs/html/preview/overview.jd
index 4c13fbc..5c2c06d 100644
--- a/docs/html/preview/overview.jd
+++ b/docs/html/preview/overview.jd
@@ -43,7 +43,7 @@
       </h5>
 
       <p>
-        You  can get updates over the air, once you’ve flashed a
+        You  can get updates over-the-air, once you’ve flashed a
         device to the initial preview.
       </p>
     </div>
@@ -51,12 +51,6 @@
 
   <div class="cols">
 
-<!--<div class="col-4of12">
-<h5>Early access to new  APIs</h5>
-<p>Explore the new capabilities and APIs offered in the new platform and give us
-feedback. Note that APIs and capabilities may change during the Preview
-program.</p>
-</div>-->
 
     <div class="col-4of12">
       <h5>
@@ -82,7 +76,7 @@
 
     <div class="col-4of12">
       <h5>
-        Feedback and support channels
+        Feedback and support
       </h5>
 
       <p>
@@ -90,6 +84,7 @@
         "https://code.google.com/p/android-developer-preview/">issue tracker</a>.
         Connect with other developers in the <a
         href="http://g.co/dev/AndroidMDevPreview">M&nbsp;Developer Community</a>.
+
       </p>
     </div>
   </div>
@@ -154,7 +149,7 @@
 <p>
   As you test and develop on Android M, we strongly recommend <strong>keeping
   your development environment up-to-date</strong> as Preview updates are released.
-  To make the process easier, we'll deliver <strong>updates over the air
+  To make the process easier, we'll deliver <strong>updates over-the-air
   (OTA)</strong> to devices already flashed to a Preview build, as well as
   providing system images that you can download and flash manually.
 </p>
@@ -279,8 +274,9 @@
   <li><a href="https://code.google.com/p/android-developer-preview/">M
   Developer Preview Issue Tracker</a> is your <strong>primary feedback
   channel.</strong> You can report bugs, performance issues, and general
-  feedback through the issue tracker. You can also check for known issues
-  and find workaround steps, if available.
+  feedback through the issue tracker. You can also check for <a
+  href="https://code.google.com/p/android-developer-preview/wiki/KnownIssues">known issues</a>
+  and find workaround steps.
   </li>
 
   <li>The <a href="http://g.co/dev/AndroidMDevPreview">Android M Developer
diff --git a/docs/html/preview/testing/guide.jd b/docs/html/preview/testing/guide.jd
index f2ab5a7..317dc44 100644
--- a/docs/html/preview/testing/guide.jd
+++ b/docs/html/preview/testing/guide.jd
@@ -9,6 +9,7 @@
       <ol>
         <li><a href="#runtime-permissions">Testing Permissions</a></li>
         <li><a href="#doze-standby">Testing Doze and App Standby</a></li>
+        <li><a href="#ids">Auto Backup and Device Identifiers</a></li>
       </ol>
   </div>
 </div>
@@ -33,6 +34,7 @@
   </li>
   <li><a href="#doze-mode">Doze and App Standby</a>
   </li>
+  <li><a href="#ids">Auto Backup and Device Identifiers</a></li>
 </ul>
 
 <p>
@@ -174,3 +176,10 @@
     from standby mode. In particular, you should check if your app's Notifications and background
     jobs continue to function as expected.</li>
 </ol>
+
+<h2 id="ids">Auto Backup for Apps and Device-Specific Identifiers</h2>
+
+<p>If your app is persisting any device-specific identifiers, such as Google
+Cloud Messaging registration ID, in internal storage,
+make sure to follow best practices to exclude the storage
+location from auto-backup, as described in <a href="">Auto Backup for Apps</a>. </p>