Add more topics for Help.

Technotes/HelpBook/5.0/en/index.markdown

@@ -7,6 +7,8 @@ More topics to do…
 
 How to add a feed
 
+Installing and using the Safari Extension to add feeds
+
 How to import OPML
 
 How to export OPML
@@ -19,6 +21,30 @@ How to delete feeds and folders (note that undo is available)
 
 How to add a syncing account
 
+How to contribute (GitHub, Slack)
+
+How to get NetNewsWire news (see Help menu command)
+
+Keyboard shortcuts (see Help menu command)
+
+About the On My Mac account
+
+Privacy (including link to privacy policy)
+
+How to add special Micro.blog feeds
+
+How to rename feeds and folders
+
+How to get and copy feed information
+
+Where NetNewsWire data is stored
+
+How to update NetNewsWire
+
+How to sort the timeline
+
+Tour of the built-in smart feeds: Today, All Unread, Starred
+
 Other ideas? Add them here.
 
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