--- a/doc/customizing.txt	Fri Aug 04 22:34:33 2006 +0000
+++ b/doc/customizing.txt	Mon Aug 07 07:15:05 2006 +0000
@@ -2,7 +2,7 @@
 Customising Roundup
 ===================
 
-:Version: $Revision: 1.197 $
+:Version: $Revision: 1.198 $
 
 .. This document borrows from the ZopeBook section on ZPT. The original is at:
    http://www.zope.org/Documentation/Books/ZopeBook/current/ZPT.stx
@@ -2088,6 +2088,12 @@
 
               <span tal:replace="structure context/due/popcal" />
 
+            you still need to include the ``field`` for the property, so
+            typically you'd have:
+
+              <span tal:replace="structure context/due/field" />
+              <span tal:replace="structure context/due/popcal" />
+
 menu        only on Link and Multilink properties - render a form select
             list for this property. Takes a number of optional arguments