diff --git a/src/lsystem/screen/main/Listener.java b/src/lsystem/screen/main/Listener.java
index dc89c0a..cc0c18c 100644
--- a/src/lsystem/screen/main/Listener.java
+++ b/src/lsystem/screen/main/Listener.java
@@ -33,7 +33,6 @@ public class Listener implements ActionListener, KeyListener, MouseWheelListener
             case "Close":
                 Component selected = frame.tabs.getSelectedComponent();
                 if (selected != null) {
-
                     frame.tabs.remove(selected);
                 }
                 frame.decreaseTab();
@@ -150,7 +149,7 @@ public class Listener implements ActionListener, KeyListener, MouseWheelListener
 
         byte i = (byte) ((type.equals("Axiome")) ? 0 :  1);
 
-        if(nbAxioms==0 && ke.getKeyChar() !='\b')
+        if(nbAxioms==0 && ke.getKeyCode() != KeyEvent.VK_BACK_SPACE)
             tab.changeList(String.valueOf(ke.getKeyChar()), tab.getTextArea(i),nbAxioms);
         if(ke.getKeyChar() == '\b'){
             String str = tab.getTextArea(i).getText();
diff --git a/src/lsystem/screen/main/MainFrame.java b/src/lsystem/screen/main/MainFrame.java
index 70486ee..41eca9a 100644
--- a/src/lsystem/screen/main/MainFrame.java
+++ b/src/lsystem/screen/main/MainFrame.java
@@ -21,7 +21,6 @@ public class MainFrame extends JFrame {
 	private final JButton help;
 	private final int nbRules;
 
-
 	public MainFrame(){
 
 		nbRules = 1;
diff --git a/src/lsystem/screen/main/Tab.java b/src/lsystem/screen/main/Tab.java
index 39bc35b..c1e4443 100644
--- a/src/lsystem/screen/main/Tab.java
+++ b/src/lsystem/screen/main/Tab.java
@@ -1,7 +1,9 @@
 package lsystem.screen.main;
 
 import javax.swing.*;
+import javax.swing.plaf.basic.BasicButtonUI;
 import java.awt.*;
+import java.awt.event.ActionListener;
 import java.util.Arrays;
 
 public class Tab extends JPanel{
@@ -17,8 +19,6 @@ public class Tab extends JPanel{
         this.nbRules = nbRules;
         this.nbTabs = nbTabs;
 
-        JPanel tab = new JPanel();
-
         axiomList = textArea("Axiome : \n",nbTabs);
         rulesList = textArea("Règles : \n",nbTabs+10);
 
@@ -65,17 +65,17 @@ public class Tab extends JPanel{
         aboveComponents.add(lists);
         aboveComponents.add(Iterations);
 
+
         aboveComponents.setLayout(new GridLayout(1,4));
-        tab.add(aboveComponents);
-        tab.add(southComponents2);
-        tab.setLayout(new BoxLayout(tab,1));
-
-        close = new JButton("Close");
-        close.addActionListener(new Listener(frame,this.nbTabs,"Close",this));
-        tab.add(close);
+        this.add(aboveComponents);
+        this.add(southComponents2);
+        this.setLayout(new BoxLayout(this,1));
+        this.add(new JButton("Close"));
 
 
-        tabs.addTab("Génération"+String.valueOf(nbTabs), tab);
+
+
+        tabs.addTab("Génération"+String.valueOf(nbTabs),this);
     }
     public JTextArea textArea(String texte, int nb){
         JTextArea res = new JTextArea();
@@ -129,4 +129,12 @@ public class Tab extends JPanel{
     public int getNbIterations(){
         return (int) itSpinner.getValue();
     }
+
+    public JButton closeButton(MainFrame frame) {
+        close = new JButton("Close");
+        int size = 17;
+        close.setPreferredSize(new Dimension(size, size));
+        close.addActionListener(new Listener(frame,this.nbTabs,"Close",this));
+        return close;
+    }
 }