Index: head/en_US.ISO8859-1/books/porters-handbook/uses/chapter.xml
===================================================================
--- head/en_US.ISO8859-1/books/porters-handbook/uses/chapter.xml
+++ head/en_US.ISO8859-1/books/porters-handbook/uses/chapter.xml
@@ -1385,8 +1385,10 @@
       ports.  See <xref linkend="using-xfce"/> for details.</para>
 
     <para>The <literal>gtk3</literal> argument specifies that the port
-      requires <application>GTK3</application> features provided by
-      <package role="port">x11/libxfce4menu</package>.</para>
+      requires <application>GTK3</application> support.  It adds
+      additional features provided by some core components, for
+      example, <package role="port">x11/libxfce4menu</package> and
+      <package role="port">x11-wm/xfce4-panel</package>.</para>
   </sect1>
 
   <sect1 xml:id="uses-zip">