diff --git a/ui (gen4)/features/base.js b/ui (gen4)/features/base.js
index 6bd0fdb7..ffc377be 100755
--- a/ui (gen4)/features/base.js	
+++ b/ui (gen4)/features/base.js	
@@ -1895,6 +1895,8 @@ module.CropActions = actions.Actions({
 							: this.data.ribbons[g] ? this.data.getImages(g) : g, 
 						// get ribbon and ribbon order...
 						[this.data.getRibbon(g), this.data.getRibbonOrder(g)],
+						// XXX this is not needed here but is used by .uncollect.undo(..)
+						this.data.order.indexOf(g),
 					] }.bind(this)) },
 			undo: function(d){ 
 				(d.placements || [])
diff --git a/ui (gen4)/features/collections.js b/ui (gen4)/features/collections.js
index 62061031..94158f7e 100755
--- a/ui (gen4)/features/collections.js	
+++ b/ui (gen4)/features/collections.js	
@@ -976,10 +976,33 @@ var CollectionActions = actions.Actions({
 		NOTE: this will remove any gid, be it image or ribbon.
 		`,
 		{
-			browseMode: function(){ return !this.collection && 'disabled' }
-			/* XXX 
-			getUndoState: function(d){},
-			undo: function(d){},
+			browseMode: function(){ return !this.collection && 'disabled' },
+			/*/ XXX two ways to go:
+			//		- .collect(..) + .data.placeImage(..)
+			//		- rewrite .collect(..) to use .data.placeImage(..) (like: .addToCrop(..))
+			//getUndoState: 'removeFromCrop',
+			getUndoState: function(d){
+				var base = this.getActionAttr('removeFromCrop', 'getUndoState')
+				base && base.call(this, d)
+				d.collection = d.args[1] || this.collection
+			},
+			// XXX this does not work yet...
+			// XXX this use 
+			undo: function(d){
+				var that = this
+				var gids = d.args[0] || [d.current]
+				gids = gids instanceof Array ? gids : [gids]
+				var collection = d.collection
+				this
+					.collect(gids, collection)
+					.ensureCollection(collection)
+						.then(function(){
+							d.placements.forEach(function(e){
+								// XXX does not place correctly...
+								that.data.placeImage(e[0], e[1], that.data.order[e[2]]) 
+							that.reload(true)
+						}) })
+			},
 			//*/
 		},
 		function(gids, collection){
diff --git a/ui (gen4)/features/core.js b/ui (gen4)/features/core.js
index dcf8b98f..e2b6273c 100755
--- a/ui (gen4)/features/core.js	
+++ b/ui (gen4)/features/core.js	
@@ -681,6 +681,9 @@ var JournalActions = actions.Actions({
 
 					// get additional undo state...
 					var update = that.getActionAttr(action, 'getUndoState')
+					while(typeof(update) == typeof('str')){
+						update = that.getActionAttr(update, 'getUndoState')
+					}
 					update 
 						&& update instanceof Function
 						&& update.call(that, data)
@@ -795,7 +798,7 @@ var JournalActions = actions.Actions({
 							// pass the action name...
 							undo.call(this, a)
 						: typeof(undo) == typeof('str') ? 
-							// pass journal structure as-is...
+							// XXX pass journal structure as-is... (???)
 							this[undo].apply(this, a.args)
 						: null