diff --git a/src/NewTools-Scopes-Browser/ScopeNode.class.st b/src/NewTools-Scopes-Browser/ScopeNode.class.st
index 3757bbec7..637e37959 100644
--- a/src/NewTools-Scopes-Browser/ScopeNode.class.st
+++ b/src/NewTools-Scopes-Browser/ScopeNode.class.st
@@ -14,13 +14,13 @@ Class {
 }
 
 { #category : 'instance creation' }
-ScopeNode class >> on: aPackageOrClass [
+ScopeNode class >> on: aRBEnvironment [
 
 	self class == ScopeNode ifTrue: [
-		self error: 'I am ab abstract class' ].
+		self error: 'I am an abstract class' ].
 	
 	^ self new
-		  value: aPackageOrClass;
+		  value: aRBEnvironment;
 		  yourself
 ]
 
@@ -36,6 +36,12 @@ ScopeNode >> = anotherNode [
 		and: [ self label = anotherNode label ]
 ]
 
+{ #category : 'accessing' }
+ScopeNode >> == anotherNode [
+
+	^ self = anotherNode
+]
+
 { #category : 'accessing' }
 ScopeNode >> basicEqualsTo: aNode [
 
@@ -62,6 +68,11 @@ ScopeNode >> isPackageNode [
 	^ false
 ]
 
+{ #category : 'testing' }
+ScopeNode >> isScopeNode [
+	^ false
+]
+
 { #category : 'accessing' }
 ScopeNode >> label [
 	^ self value name
diff --git a/src/NewTools-Scopes-Browser/ScopePackageNode.class.st b/src/NewTools-Scopes-Browser/ScopePackageNode.class.st
index 8d8650d0a..8977f28a1 100644
--- a/src/NewTools-Scopes-Browser/ScopePackageNode.class.st
+++ b/src/NewTools-Scopes-Browser/ScopePackageNode.class.st
@@ -27,6 +27,11 @@ ScopePackageNode >> isPackageNode [
 	^ true
 ]
 
+{ #category : 'testing' }
+ScopePackageNode >> isScopeNode [
+	^ false
+]
+
 { #category : 'accessing' }
 ScopePackageNode >> scopesIconName [
 	^ #package
diff --git a/src/NewTools-Scopes-Browser/ScopeScopeNode.class.st b/src/NewTools-Scopes-Browser/ScopeScopeNode.class.st
index b884fa612..706bfdf45 100644
--- a/src/NewTools-Scopes-Browser/ScopeScopeNode.class.st
+++ b/src/NewTools-Scopes-Browser/ScopeScopeNode.class.st
@@ -12,8 +12,21 @@ Class {
 { #category : 'accessing' }
 ScopeScopeNode >> children [
 
-	^ self value basisObjects collect: [ :package |
-		  ScopePackageNode on: package ]
+	| className class package |
+	^ self value basisObjects collect: [ :stringOrPackage |
+		  stringOrPackage isString
+			  ifTrue: [
+				  className := stringOrPackage.
+				  class := self systemDictionary at: className ifAbsent: [ nil ].
+				  ScopeClassNode on: class ]
+			  ifFalse: [
+				  package := stringOrPackage.
+				  ScopePackageNode on: package ] ]
+]
+
+{ #category : 'testing' }
+ScopeScopeNode >> isScopeNode [
+	^ true
 ]
 
 { #category : 'accessing' }
@@ -25,3 +38,8 @@ ScopeScopeNode >> label [
 ScopeScopeNode >> scopesIconName [
 	^ #references
 ]
+
+{ #category : 'accessing' }
+ScopeScopeNode >> systemDictionary [
+	^ Smalltalk globals
+]
diff --git a/src/NewTools-Scopes-Browser/ScopesPresenter.class.st b/src/NewTools-Scopes-Browser/ScopesPresenter.class.st
index d55fbb600..60e22d91c 100644
--- a/src/NewTools-Scopes-Browser/ScopesPresenter.class.st
+++ b/src/NewTools-Scopes-Browser/ScopesPresenter.class.st
@@ -53,6 +53,17 @@ ScopesPresenter class >> title [
 ScopesPresenter >> addScopeToTree: aRBEnvironment [
 
 	model addScope: aRBEnvironment.
+	scopesTree updateRootsKeepingSelection:
+		(model scopes collect: [ :scope |self halt. ScopeScopeNode on: scope ])
+			asOrderedCollection
+]
+
+{ #category : 'deletion' }
+ScopesPresenter >> deleteSelectedScope [
+
+	scopesTree selectedItems
+		select: [ :item | item isScopeNode ]
+		thenDo: [ :item | model removeScope: item ].
 	scopesTree updateRootsKeepingSelection:
 		(model scopes collect: [ :scope | ScopeScopeNode on: scope ])
 			asOrderedCollection
@@ -83,6 +94,7 @@ ScopesPresenter >> initializeScopesTree [
 		  beMultipleSelection;
 		  roots:
 			  (model scopes collect: [ :package |
+				self halt.
 					   ScopeScopeNode on: package ]) asOrderedCollection sorted;
 		  beResizable;
 		  activateOnDoubleClick;
diff --git a/src/NewTools-Scopes/ScopesManager.class.st b/src/NewTools-Scopes/ScopesManager.class.st
index 8ceb99ea3..da825b854 100644
--- a/src/NewTools-Scopes/ScopesManager.class.st
+++ b/src/NewTools-Scopes/ScopesManager.class.st
@@ -105,12 +105,20 @@ ScopesManager >> newScopeFrom: aSetOfNodes [
 
 ]
 
+{ #category : 'removing' }
+ScopesManager >> removeScope: aRBEnvironment [
+	| removed |
+	removed := scopes select: [ :scope | scope label = aRBEnvironment label ].
+	removed do: [ :scope | scopes remove: scope ]
+]
+
 { #category : 'initialization' }
 ScopesManager >> reset [
 
 	environment := nil.
 	scopes := nil.
-	self announcer subscriptions reset
+	self announcer subscriptions reset.
+	self resetNewScope
 ]
 
 { #category : 'accessing' }