diff -r -u -X exclude trunk/gtk2_ardour/editor.cc 1550/gtk2_ardour/editor.cc
--- trunk/gtk2_ardour/editor.cc	2007-03-14 23:12:54.000000000 +0000
+++ 1550/gtk2_ardour/editor.cc	2007-03-15 00:12:19.000000000 +0000
@@ -508,7 +508,7 @@
 
 	edit_group_display.set_name ("EditGroupList");
 	edit_group_display.get_selection()->set_mode (SELECTION_SINGLE);
-	edit_group_display.set_headers_visible (false);
+	edit_group_display.set_headers_visible (true);
 	edit_group_display.set_reorderable (false);
 	edit_group_display.set_rules_hint (true);
 	edit_group_display.set_size_request (75, -1);