diff --git a/doc/config.html b/doc/config.html
index 45c58f28..b15a6c44 100755
--- a/doc/config.html
+++ b/doc/config.html
@@ -390,6 +390,13 @@ The default value is 76 (78 for replies), and can be increased for installations
 which need a larger window size (like pasting log files etc.).
 <p>
 
+<li><b><code>Message Height = &lt;number&gt;</code></b>
+<br>
+This value sets the number of lines of the main message entry field.
+The default value is 20, and can be changed for installations
+which need a different window size.
+<p>
+
 <li><b><code>Display mode = [full|summary|threaded]</code></b>
 <br>
 Default mode for search display. On the find entry form, the checkboxes