diff --git a/sources/conductorautonumerotation.cpp b/sources/conductorautonumerotation.cpp
index 5dccbd9d9..eef9452ca 100644
--- a/sources/conductorautonumerotation.cpp
+++ b/sources/conductorautonumerotation.cpp
@@ -114,22 +114,25 @@ void ConductorAutoNumerotation::applyText(QString t)
  * @brief ConductorAutoNumerotation::numeratePotential
  * Numerate a conductor on an existing potential
  */
-void ConductorAutoNumerotation::numeratePotential() {
+void ConductorAutoNumerotation::numeratePotential()
+{
 	QStringList strl;
 	foreach (const Conductor *cc, conductor_list) strl<<(cc->text());
+
 		//the texts is identicals
-	if (QET::eachStrIsEqual(strl)) {
+	if (QET::eachStrIsEqual(strl))
+	{
 		ConductorProperties cp = conductor_ -> properties();
 		cp.text = strl.at(0);
 		conductor_ -> setProperties(cp);
 		conductor_ -> setText(strl.at(0));
 	}
-	//the texts isn't identicals
-	else {
+		//the texts isn't identicals
+	else
+	{
 		PotentialTextsDialog ptd (conductor_, conductor_ -> diagramEditor());
-		if (ptd.exec() == QDialog::Accepted) {
-			applyText(ptd.selectedText());
-		}
+		ptd.exec();
+		applyText(ptd.selectedText());
 	}
 }
 
diff --git a/sources/qetgraphicsitem/conductor.cpp b/sources/qetgraphicsitem/conductor.cpp
index b9e4f7026..4710cdd00 100644
--- a/sources/qetgraphicsitem/conductor.cpp
+++ b/sources/qetgraphicsitem/conductor.cpp
@@ -90,15 +90,11 @@ Conductor::Conductor(Terminal *p1, Terminal* p2) :
 	setFlags(QGraphicsItem::ItemIsSelectable);
 	setAcceptHoverEvents(true);
 	
-	// ajout du champ de texte editable
+		// Add the text field
 	text_item = new ConductorTextItem(properties_.text, this);
 	text_item -> setFlag(QGraphicsItem::ItemStacksBehindParent);
-	connect(
-		text_item,
-		SIGNAL(diagramTextChanged(DiagramTextItem *, const QString &, const QString &)),
-		this,
-		SLOT(displayedTextChanged())
-	);
+
+	connect(text_item, &ConductorTextItem::diagramTextChanged, this, &Conductor::displayedTextChanged);
 }
 
 /**
@@ -1392,43 +1388,38 @@ void Conductor::setHighlighted(Conductor::Highlight hl) {
 }
 
 /**
-	Met a jour les proprietes du conducteur apres modification du champ de texte affiche
-*/
-void Conductor::displayedTextChanged() {
-	// verifie que le texte a reellement change
-	if (text_item -> toPlainText() == properties_.text) return;
-	
-	if (Diagram *my_diagram = diagram())
+ * @brief Conductor::displayedTextChanged
+ * Update the properties (text) of this conductor and other conductors
+ * at the same potential of this conductor.
+ */
+void Conductor::displayedTextChanged()
+{
+	if ((text_item->toPlainText() == properties_.text) || !diagram()) return;
+
+	QVariant old_value, new_value;
+	old_value.setValue(properties_);
+	ConductorProperties new_properties(properties_);
+	new_properties.text = text_item -> toPlainText();
+	new_value.setValue(new_properties);
+
+	QPropertyUndoCommand *undo = new QPropertyUndoCommand(this, "properties", old_value, new_value);
+	undo->setText(tr("Modifier les propriétés d'un conducteur", "undo caption"));
+
+	if (!relatedPotentialConductors().isEmpty())
 	{
-		int qmbreturn=0;
-			//if conductor isn't alone at this potential
-			//ask user to apply text on every conductors of this potential
-		if (relatedPotentialConductors().size() >= 1)
-		{
-			qmbreturn = QMessageBox::question(diagramEditor(), tr("Textes de conducteurs"),
-											  tr("Voulez-vous appliquer le nouveau texte \n"
-												 "à l'ensemble des conducteurs de ce potentiel ?"),
-											  QMessageBox::No| QMessageBox::Yes, QMessageBox::Yes);
-			if (qmbreturn == QMessageBox::Yes)
-			{
-				ConductorAutoNumerotation can(this, my_diagram);
-				can.applyText(text_item -> toPlainText());
-			}
-		}
+		undo->setText(tr("Modifier les propriétés de plusieurs conducteurs", "undo caption"));
 
-		if (qmbreturn == 0 || qmbreturn == QMessageBox::No)
+		foreach (Conductor *potential_conductor, relatedPotentialConductors())
 		{
-			QVariant old_value, new_value;
-			old_value.setValue(properties_);
-			ConductorProperties new_properties(properties_);
-			new_properties.text = text_item -> toPlainText();
+			old_value.setValue(potential_conductor->properties());
+			ConductorProperties new_properties = potential_conductor->properties();
+			new_properties.text = text_item->toPlainText();
 			new_value.setValue(new_properties);
-
-			QPropertyUndoCommand *undo = new QPropertyUndoCommand(this, "properties", old_value, new_value);
-			undo->setText(tr("Modifier les propriétés d'un conducteur", "undo caption"));
-			my_diagram -> undoStack().push(undo);
+			new QPropertyUndoCommand (potential_conductor, "properties", old_value, new_value, undo);
 		}
 	}
+
+	diagram()->undoStack().push(undo);
 }
 
 
diff --git a/sources/ui/conductorpropertiesdialog.cpp b/sources/ui/conductorpropertiesdialog.cpp
index 0b35752f9..c27642ffe 100644
--- a/sources/ui/conductorpropertiesdialog.cpp
+++ b/sources/ui/conductorpropertiesdialog.cpp
@@ -61,28 +61,44 @@ void ConductorPropertiesDialog::PropertiesDialog(Conductor *conductor, QWidget *
 {
 	ConductorPropertiesDialog cpd (conductor, parent);
 
-	if (cpd.exec() == QDialog::Accepted && cpd.properties() != conductor->properties())
+	if (cpd.exec() == QDialog::Rejected || cpd.properties() == conductor->properties()) return;
+
+	QVariant old_value, new_value;
+	old_value.setValue(conductor->properties());
+	new_value.setValue(cpd.properties());
+
+	QPropertyUndoCommand *undo = new QPropertyUndoCommand(conductor, "properties", old_value, new_value);
+	undo->setText(tr("Modifier les propriétés d'un conducteur", "undo caption"));
+
+	if (!conductor->relatedPotentialConductors().isEmpty())
 	{
-		QVariant old_value, new_value;
-		old_value.setValue(conductor->properties());
-		new_value.setValue(cpd.properties());
+		undo->setText(tr("Modifier les propriétés de plusieurs conducteurs", "undo caption"));
+		QString old_text = conductor->properties().text;
+		QString new_text = cpd.properties().text;
 
-		QPropertyUndoCommand *undo = new QPropertyUndoCommand(conductor, "properties", old_value, new_value);
-		undo->setText(tr("Modifier les propriétés d'un conducteur", "undo caption"));
-
-			//Make undo for all related potiential conductors
-		if (cpd.applyAll() && !conductor->relatedPotentialConductors().isEmpty())
+		foreach (Conductor *potential_conductor, conductor->relatedPotentialConductors())
 		{
-			undo->setText(tr("Modifier les propriétés de plusieurs conducteurs", "undo caption"));
-			foreach (Conductor *cond, conductor->relatedPotentialConductors())
+				//"Apply to all conductors of potential" is checked,
+				//we apply the new properties for every conductors in the same potential.
+			if (cpd.applyAll())
 			{
-				old_value.setValue(cond->properties());
-				new QPropertyUndoCommand (cond, "properties", old_value, new_value, undo);
+				old_value.setValue(potential_conductor->properties());
+				new QPropertyUndoCommand (potential_conductor, "properties", old_value, new_value, undo);
+			}
+				//The num of conductor isn't affected by "Apply to all conductors of potential"
+				//we always apply it to the potential if he change.
+			else if(old_text != new_text)
+			{
+				old_value.setValue(potential_conductor->properties());
+				ConductorProperties new_properties = potential_conductor->properties();
+				new_properties.text = new_text;
+				new_value.setValue(new_properties);
+				new QPropertyUndoCommand (potential_conductor, "properties", old_value, new_value, undo);
 			}
 		}
-
-		conductor->diagram()->undoStack().push(undo);
 	}
+
+	conductor->diagram()->undoStack().push(undo);
 }
 
 /**
diff --git a/sources/ui/potentialtextsdialog.ui b/sources/ui/potentialtextsdialog.ui
index 5108a809c..991da90f4 100644
--- a/sources/ui/potentialtextsdialog.ui
+++ b/sources/ui/potentialtextsdialog.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
+    <width>403</width>
     <height>94</height>
    </rect>
   </property>
@@ -20,7 +20,7 @@
       <widget class="QLabel" name="label">
        <property name="text">
         <string>Les textes de ce potentiel électrique ne sont pas identiques.
-Appliquer un texte à l'ensemble de ces conducteurs?</string>
+Appliquer un texte à l'ensemble de ces conducteurs.</string>
        </property>
       </widget>
      </item>
@@ -48,7 +48,7 @@ Appliquer un texte à l'ensemble de ces conducteurs?</string>
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="standardButtons">
-      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+      <set>QDialogButtonBox::Ok</set>
      </property>
     </widget>
    </item>