diff --git a/Technotes/HelpBook.opml b/Technotes/HelpBook.opml
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+<?xml version="1.0" encoding="UTF-8"?>
+<opml version="2.0">
+  <head><!-- <editor scale-mac="1.5">
+      <sidebar width="203"/>
+      <column name="text" width="907"/>
+    </editor> -->
+    <title>HelpBook</title>
+    <dateCreated>Sun, 17 Feb 2019 22:26:12 GMT</dateCreated>
+    <expansionState>24,27</expansionState>
+    <vertScrollState>10</vertScrollState>
+    <windowTop>207</windowTop>
+    <windowLeft>46</windowLeft>
+    <windowRight>983</windowRight>
+    <windowBottom>910</windowBottom>
+  </head>
+  <body>
+    <outline text="How to add feeds"/>
+    <outline text="Installing Safari extension"/>
+    <outline text="How to go through articles"/>
+    <outline text="What is a feed?"/>
+    <outline text="Keyboard shortcuts"/>
+    <outline text="Contributing - Slack group, GitHub"/>
+    <outline text="Getting NetNewsWire news"/>
+    <outline text="Privacy"/>
+    <outline text="About the On My Mac account"/>
+    <outline text="Adding a syncing account"/>
+    <outline text="Importing subscriptions from another app - OPML"/>
+    <outline text="Exporting subscriptions to use in a another app - OPML"/>
+    <outline text="Sharing with other apps, particularly blogging apps"/>
+    <outline text="Adding microblog feeds"/>
+    <outline text="Renaming feeds and folders"/>
+    <outline text="Getting and copying feed information"/>
+    <outline text="OPML file on disk"/>
+    <outline text="Other app data on disk"/>
+    <outline text="Searching"/>
+    <outline text="Customizing the toolbar"/>
+    <outline text="Hidden prefs"/>
+    <outline text="Updating NetNewsWire"/>
+    <outline text="Sorting the timeline"/>
+    <outline text="Smart feeds - Today, All Unread, Starred"/>
+    <outline text="Philosophy of saving articles">
+      <outline text="NetNewsWire is not a personal backup of the internet"/>
+      <outline text="Articles automatically marked as read"/>
+    </outline>
+    <outline text="Notes for feed publishers">
+      <outline text="Supported formats"/>
+      <outline text="Conditional GET"/>
+      <outline text="Where app gets favicons and images"/>
+    </outline>
+  </body>
+</opml>
