Update README

README.md

@@ -113,7 +113,7 @@ class Demo {
             new RadioGroup (3, 8, new [] { "_Personal", "_Company" }),
             new Button (3, 14, "Ok"),
             new Button (10, 14, "Cancel"),
-            new Label (3, 18, "Press ESC and 9 to activate the menubar"));
+            new Label (3, 18, "Press F9 or ESC plus 9 to activate the menubar"));
 
         Application.Run ();
     }