diff --git a/repository/Grafoscopio/GrafoscopioDocumentation.class.st b/repository/Grafoscopio/GrafoscopioDocumentation.class.st
index eaa9576..d470249 100644
--- a/repository/Grafoscopio/GrafoscopioDocumentation.class.st
+++ b/repository/Grafoscopio/GrafoscopioDocumentation.class.st
@@ -82,9 +82,9 @@ GrafoscopioDocumentation class >> update [
 		
 ]
 
-{ #category : #'as yet unclassified' }
+{ #category : #updating }
 GrafoscopioDocumentation class >> updateDocsPlaceUI [
-	self current localPlace: (UIManager default chooseDirectory: 'Path to the documents Folder')
+	self current localPlace: (UIManager default chooseDirectory: 'Path to the documentation folder')
 ]
 
 { #category : #accessing }
diff --git a/repository/Grafoscopio/GrafoscopioGUI.class.st b/repository/Grafoscopio/GrafoscopioGUI.class.st
index 14b70e5..712c328 100644
--- a/repository/Grafoscopio/GrafoscopioGUI.class.st
+++ b/repository/Grafoscopio/GrafoscopioGUI.class.st
@@ -443,7 +443,7 @@ GrafoscopioGUI class >> startDockingBar [
 		add: 'Grafoscopio' target: self selector: #updateGrafoscopioUI;
 		add: 'Documentation' target: self selector: #updateDocumentationUI;
 		add: 'DataViz package' target: self selector: #updateDatavizUI;
-		add: 'Documents place' target: GrafoscopioDocumentation selector: #updateDocsPlaceUI;
+		add: 'Notebooks places' target: GrafoscopioDocumentation selector: #updateDocsPlaceUI;
 		"add: 'Database engine' target: ExternalApp selector: #installSQLite32BitsUI;
 		add: 'Pandoc path' target: ExternalApp selector: #configurePandoc;
 		add: 'Fossil path' target: ExternalApp selector: #configureFossil;"
@@ -451,8 +451,9 @@ GrafoscopioGUI class >> startDockingBar [
 	
 	helpMenu := MenuMorph new.
 	helpMenu 
-		add: 'Tutorial' target: (GrafoscopioNotebook new) selector: #openTutorial;
+		add: 'Tutorial (Spanish)' target: (GrafoscopioNotebook new) selector: #openTutorial;
 		add: 'Manual' target: (self new) selector: #openManual;
+		add: 'Manual (PDF)' target: (self new) selector: #openPDFManual;
 		add: 'About Grafoscopio' target: self selector: #messageAbout.
 		
 	dockingBar := DockingBarMorph new.
diff --git a/repository/Grafoscopio/GrafoscopioNode.class.st b/repository/Grafoscopio/GrafoscopioNode.class.st
index 9789f8b..7dad173 100644
--- a/repository/Grafoscopio/GrafoscopioNode.class.st
+++ b/repository/Grafoscopio/GrafoscopioNode.class.st
@@ -134,6 +134,21 @@ GrafoscopioNode >> ancestors [
    ^ ancestors 
 ]
 
+{ #category : #accessing }
+GrafoscopioNode >> ancestorsAll [
+	"I return a collection of all the nodes wich are ancestors of the receiver node"
+	| currentNode ancestors |
+	
+	currentNode := self.
+	ancestors := OrderedCollection new.
+	[ currentNode parent notNil and: [ currentNode level > 0 ] ]
+		whileTrue: [ 
+			ancestors add: currentNode parent.
+			currentNode := currentNode parent].
+	ancestors := ancestors reversed.
+   ^ ancestors 
+]
+
 { #category : #accessing }
 GrafoscopioNode >> ancestorsHeaders [
 	"Returns the headers of all the ancestors of the node. 
@@ -657,6 +672,14 @@ GrafoscopioNode >> removeNode: aNode [
 	
 ]
 
+{ #category : #accessing }
+GrafoscopioNode >> root [
+	"I return the node of the Grafoscopio tree that contains the receiver"
+	self level = 0 
+		ifTrue: [ ^ self ]
+		ifFalse: [ ^ self ancestors first. ]
+]
+
 { #category : #accessing }
 GrafoscopioNode >> saveContent: anObject [
 	"Sets the receivers body to the given object"
diff --git a/repository/Grafoscopio/GrafoscopioNodeTest.class.st b/repository/Grafoscopio/GrafoscopioNodeTest.class.st
new file mode 100644
index 0000000..bc33944
--- /dev/null
+++ b/repository/Grafoscopio/GrafoscopioNodeTest.class.st
@@ -0,0 +1,23 @@
+"
+I test the main functionality of the GrafoscopioNode class.
+"
+Class {
+	#name : #GrafoscopioNodeTest,
+	#superclass : #TestCase,
+	#category : #'Grafoscopio-Model'
+}
+
+{ #category : #tests }
+GrafoscopioNodeTest >> testAddingChildren [
+	| tree nnode orig modif | 
+	tree := GrafoscopioNode new becomeDefaultTestTree.
+	nnode := GrafoscopioNode new.
+	orig := tree children size.
+	tree addNode: nnode.
+	
+]
+
+{ #category : #tests }
+GrafoscopioNodeTest >> testInitializeIsOk [
+	self shouldnt: [ GrafoscopioNode new ] raise: Error 
+]
diff --git a/repository/Grafoscopio/GrafoscopioNotebook.class.st b/repository/Grafoscopio/GrafoscopioNotebook.class.st
index 49cd2a5..e349345 100644
--- a/repository/Grafoscopio/GrafoscopioNotebook.class.st
+++ b/repository/Grafoscopio/GrafoscopioNotebook.class.st
@@ -178,6 +178,7 @@ GrafoscopioNotebook >> initializeWidgets [
 		add: header;
 		add: body;
 		add: links.
+	self askOkToClose: true.
 ]
 
 { #category : #accessing }
@@ -382,6 +383,11 @@ GrafoscopioNotebook >> notebookSubMenu [
 					action: [ self inform: 'To be implemented...' ] ]	]
 ]
 
+{ #category : #private }
+GrafoscopioNotebook >> okToChange [
+	^ true
+]
+
 { #category : #persistence }
 GrafoscopioNotebook >> openDefault [
 "I open a new default notebook"
diff --git a/repository/Grafoscopio/ManifestGrafoscopio.class.st b/repository/Grafoscopio/ManifestGrafoscopio.class.st
index f578248..787bd53 100644
--- a/repository/Grafoscopio/ManifestGrafoscopio.class.st
+++ b/repository/Grafoscopio/ManifestGrafoscopio.class.st
@@ -27,6 +27,11 @@ ManifestGrafoscopio class >> ruleRBSentNotImplementedRuleV1FalsePositive [
 	^ #(#(#(#RGMetaclassDefinition #(#'GrafoscopioGUI class' #GrafoscopioGUI)) #'2015-12-23T10:38:16.706667-05:00') #(#(#RGClassDefinition #(#GrafoscopioGUI)) #'2016-01-06T18:53:45.844051-05:00') #(#(#RGMethodDefinition #(#GrafoscopioNotebook #newWindowMainMenu #false)) #'2016-12-17T18:51:40.617924-05:00') )
 ]
 
+{ #category : #'code-critics' }
+ManifestGrafoscopio class >> ruleRBShouldntRaiseErrorRuleV1FalsePositive [
+	^ #(#(#(#RGMethodDefinition #(#GrafoscopioNodeTest #testInitializeIsOk #false)) #'2017-01-31T12:49:28.199769-05:00') )
+]
+
 { #category : #'code-critics' }
 ManifestGrafoscopio class >> ruleRBStringConcatenationRuleV1FalsePositive [
 	^ #(#(#(#RGMethodDefinition #(#'FileUtils class' #createFilesNamed:endingWith:intoFolder: #true)) #'2017-01-01T21:48:26.712639-05:00') )