diff --git a/repository/Grafoscopio/GrafoscopioNode.class.st b/repository/Grafoscopio/GrafoscopioNode.class.st
index 2c53f42..09ef202 100644
--- a/repository/Grafoscopio/GrafoscopioNode.class.st
+++ b/repository/Grafoscopio/GrafoscopioNode.class.st
@@ -190,7 +190,7 @@ GrafoscopioNode >> becomeDefaultTestTree [
 		header: 'Arbol principal'.	
 	node1 := self class new
 		header: 'Markup';
-		body:  'I am just a node with markup';
+		body:  'I am <b>just a node with markup</b>';
 		tagAs: 'text';
 		links: 'temp.md';
 		level: 1.
@@ -199,18 +199,18 @@ GrafoscopioNode >> becomeDefaultTestTree [
 		tagAs: 'código';
 		body:  '(ConfigurationOfGrafoscopio>>#version14:) sourceCode'.
 	node3 := self class new
-		header: 'Child';
+		header: '%invisible';
 		tagAs: 'text';
-		body:  'Just testing'.
+		body:  '<i>Just testing</i>'.
 	node1 addNode: node3.
 	node4 := self class new
 		header: 'Something';
 		tagAs: 'text';
-		body:  'else'.
+		body:  '<h1>else</h1>'.
 	node1 addNode: node4.
+	node1 addNode: node2.
 	self 
-		addNode: node1;
-		addNode: node2.
+		addNode: node1.
 ]
 
 { #category : #initialization }
@@ -502,16 +502,29 @@ GrafoscopioNode >> headers [
 	^ headers := self children collect: [:currentNode | currentNode header ] 
 ]
 
-{ #category : #'as yet unclassified' }
+{ #category : #operation }
 GrafoscopioNode >> htmlToMarkdown [
 	"I convert the node body from HTML format to Pandoc's Markdown."
 	| htmlFile |
+	
+	(self isTaggedAs: 'código' ) ifTrue: [ ^self ].
+	((self headerStartsWith: '%invisible') or:[self hasAncestorHeaderWith: '%invisible']) 
+		ifTrue: [ ^self ].
+	
 	htmlFile := FileLocator temp asFileReference / 'body.html'.
 	htmlFile ensureDelete.
 	htmlFile ensureCreateFile.
 	htmlFile writeStreamDo: [:stream | stream nextPutAll: self body].
+	
 	self body: (PipeableOSProcess command: 'pandoc -f html -t markdown --atx-headers ', htmlFile fullName) output.
-	"htmlFile ensureDelete."	
+	htmlFile ensureDelete.
+	
+]
+
+{ #category : #operation }
+GrafoscopioNode >> htmlToMarkdownSubtree [
+	"I convert self and childern nodes body from HTML format to Pandoc's Markdown."
+	 self preorderTraversal do: [ :each | each htmlToMarkdown ]
 ]
 
 { #category : #accessing }