Index: trunk/BNC/bnchelp.html
===================================================================
--- trunk/BNC/bnchelp.html	(revision 4047)
+++ trunk/BNC/bnchelp.html	(revision 4049)
@@ -568,5 +568,5 @@
 
 <p><a name="reqcedit"><h4>3.6.2 Set Edit Options - mandatory if 'Edit/Concatenate' is set</h4></p>
-<p>Once action 'Edit/Concationate' is selected, you have to specify editing options. BNC lets you specify the RINEX version, sampling rate, begin and end of file and marker, antenna or receiver details.
+<p>Once an 'Edit/Concationate' action is selected, you have to specify editing options. BNC lets you specify the RINEX version, sampling rate, begin and end of file and marker, antenna or receiver details.
 </p>
 <p>
@@ -575,6 +575,9 @@
 <li>C1P in RINEX Version 3 is mapped to P1 in RINEX Version 2</li>
 <li>C2P in RINEX Version 3 is mapped to P2 in RINEX Version 2</li>
-<li>If several observations in RINEX Version 3 come with the same observation type, same band/frequency but different tracking modes, BNC uses only the one provided first for creating RINEX Version 2 while ignoring the others.</li>
-</ul>
+<li>If several observations in RINEX Version 3 come with the same observation type, same band/frequency but different tracking modes, BNC uses only the one provided first for creating RINEX Version 2 while ignoring others.</li>
+</ul>
+</p>
+<p>
+If you specify a 'New' but no 'Old' marker/antenna/receiver name, the corresponding data field in the emerging new RINEX file is filled accordingly. If you in addition specify an 'Old' marker/antenna/receiver name, the corresponding data field in the emerging new RINEX file is only filled accordingly where 'Old' specifications match already existing data field contents.
 </p>