diff --git a/ui (gen4)/features/ui.js b/ui (gen4)/features/ui.js
index 9adb489e..7638fdce 100755
--- a/ui (gen4)/features/ui.js	
+++ b/ui (gen4)/features/ui.js	
@@ -1928,6 +1928,7 @@ var ControlActions = actions.Actions({
 			// Not for direct use.
 		})],
 
+	// XXX do not do anything on viewer focus... (???)
 	toggleImageClickHandling: ['Interface/Image click handling',
 		toggler.Toggler(null,
 			function(){