diff --git a/web/onos-topology.html b/web/onos-topology.html
index 1edbaee..5297871 100644
--- a/web/onos-topology.html
+++ b/web/onos-topology.html
@@ -25,6 +25,8 @@
 <script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>
 </head>
 <body>
+<button id="more">more</button>
+<button id="less">lesse</button>
 <svg width="4in" height="2in" 
      viewBox="0 0 4000 2000" version="1.1"
      xmlns="http://www.w3.org/2000/svg">