diff --git a/Window.py b/Window.py
index 1d7d6af..3cf10e4 100644
--- a/Window.py
+++ b/Window.py
@@ -36,12 +36,14 @@ class Window:
         adjust_button = gtk.Button('Adjust')
         in_button = gtk.Button('In')
         out_button = gtk.Button('Out')
+        exit_button = gtk.Button('Exit')
 
         hbox = gtk.HBox()
-        hbox.pack_start(self.mark_label)
-        hbox.pack_start(adjust_button)
-        hbox.pack_start(in_button)
-        hbox.pack_start(out_button)
+        hbox.pack_start(self.mark_label, expand = True, fill = False)
+        hbox.pack_start(adjust_button, expand = False)
+        hbox.pack_start(in_button, expand = False)
+        hbox.pack_start(out_button, expand = False)
+        hbox.pack_start(exit_button, expand = False)
 
         vbox = gtk.VBox()
         vbox.pack_start(self.menubar)