Index: trunk/doc/conf/groups.html
===================================================================
--- trunk/doc/conf/groups.html	(revision 16817)
+++ trunk/doc/conf/groups.html	(revision 16818)
@@ -27,7 +27,7 @@
 Thus saving or loading a subtree can fully save or restore a property of the
 program, even if that property is affected by multiple settings.
 
-<h2> pcb-rnd config tree </h2>
+<h2 id="tree"> pcb-rnd config tree </h2>
 The config tree, the full tree is, something that exists in memory. Actual
 config files often contain only a subset of the tree. Multiple config files
 (e.g. system level, user level, settings from the board file) are loaded and