diff --git a/ui (gen4)/viewer.js b/ui (gen4)/viewer.js
index 54016ba2..ba3c730d 100755
--- a/ui (gen4)/viewer.js	
+++ b/ui (gen4)/viewer.js	
@@ -1298,6 +1298,8 @@ module.ImageGridFeatures = Object.create(features.FeatureSet)
 
 //---------------------------------------------------------------------
 
+// XXX is this the right level for this???
+// 		...data seems to be a better candidate...
 // XXX would be great to add a mechanism define how to reverse actions...
 // 		...one way to do this at this point is to revert to last state
 // 		and re-run the journal until the desired event...