In Outlook 2013, how to mark items as read after viewed the message in the Reading Pane with specific time?

By default, messages will be marked as read when selection changes.  If you want to mark items as read after a specific time,

1. Click “File” tab and choose “Options”.
2. Choose “Advanced” and click “Reading Pane” under Outlook panes.
   
3. Uncheck “Mark item as read when selection changes”, check “Mark items as read when viewed in the Reading Pane” and then enter a number in the “Wait __ seconds before marking item as read”.
   
4. Click “OK” on the dialog boxes to change the setting.