diff --git a/doc/config.html b/doc/config.html
index 0ee453d9..3da1da6e 100755
--- a/doc/config.html
+++ b/doc/config.html
@@ -203,6 +203,15 @@ Normally, one can see the logbook selection page without having to log in. If on
 wants to require a login for the selection page, this switch can be set to
 <b><code>1</code></b>. Default is <b><code>0</code></b>.<p>
 
+<LI><b><code>Expand Selection page = 0 | 1</code></b>
+<br>
+If this option is not present or set to one, the logbook selection page is expanded
+(all logbooks are shown if groups of logbooks are present). If this option is zero,
+only the group names are displayed. If one clicks on a group, its logbooks are shown.
+Using this option set to zero only makes sense if one has a large number of logbooks
+which would not fit on a single browser window, so collapsing makes sense.
+Default is <b><code>1</code></b>.<p>
+
 <LI><b><code>SMTP host = &lt;host.domain&gt;</code></b>
 <br>
 This defines the SMTP host needed to send automatic email notifications. The host