diff --git a/EduNetworkBuilder/NetworkBuilder.cs b/EduNetworkBuilder/NetworkBuilder.cs
index 6af015c..e7eec29 100644
--- a/EduNetworkBuilder/NetworkBuilder.cs
+++ b/EduNetworkBuilder/NetworkBuilder.cs
@@ -229,6 +229,10 @@ namespace EduNetworkBuilder
             {
                 doSave(true);
             }
+            if (e.KeyCode == Keys.Z && e.Modifiers == Keys.Control)
+            {
+                //ctrl-z
+            }
             //MessageBox.Show(e.KeyCode.ToString());
         }