Index: /trunk/BNC/bnchelp.html
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--- /trunk/BNC/bnchelp.html	(revision 4029)
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@@ -280,4 +280,5 @@
 &nbsp; &nbsp; &nbsp; 3.19.2. <a href=#post>Offline Mode</a><br>
 &nbsp; &nbsp; &nbsp; 3.19.3. <a href=#conffile>Configuration File</a><br>
+&nbsp; &nbsp; &nbsp; 3.19.4. <a href=#confopt>Configuration Options</a><br>
 </p>
 
@@ -2261,4 +2262,24 @@
 </p> 
 
+<p><a name="confopt"><h4>3.19.4 Configuration Options - optional</h4></p>
+<p> 
+BNC applies options from the configuration file but allows updating any of them through options specified on the command line while the contents of the configuration file remains unchanged. The command line syntax for that looks as follows
+</p>
+<p>
+--key &lt;keyName&gt; &lt;keyValue&gt;
+</p>
+<p>
+where &lt;keyName&gt; stands for the name of an option contained in the configuration file and &lt;keyValue&gt; stands for the value you want to assign to it. The following is a syntax example for a complete command line:
+</p>
+<p>
+bnc --nw --conf &lt;confFileName&gt --key &lt;keyName1&gt; &lt;keyValue1&gt; --key &lt;keyName2&gt; &lt;keyValue2&gt; ...
+</p>
+<p>
+Example:
+</p>
+<p>
+./bnc -conf CONFIG.bnc --key proxyPort=8001 --key rnxIntr="1 day"
+</p> 
+
 <p><a name="limits"><h3>4. Limitations &amp; Known Bugs</h3></p>
 <ul>
