diff --git a/ontology/ontology.json b/ontology/ontology.json
index df657c9..52cd6fc 100644
--- a/ontology/ontology.json
+++ b/ontology/ontology.json
@@ -264,6 +264,8 @@
                                 "soup": {},
                                 "tea": {}
                             },
+                            "tech": {
+                            },
                             "miscellaneous": {
                                 "bicycle": {},
                                 "make-up": {},
diff --git a/static/html/print.html b/static/html/print.html
index be06c7e..faf54f9 100644
--- a/static/html/print.html
+++ b/static/html/print.html
@@ -1,3 +1,4 @@
+<meta charset="utf-8" />
 <script src="/static/oxjs/min/Ox.js"></script>
 <script>
 function pandora_api(action, data, callback) {
diff --git a/static/ontology/index.css b/static/ontology/index.css
index dc61099..7dd1943 100644
--- a/static/ontology/index.css
+++ b/static/ontology/index.css
@@ -19,3 +19,9 @@ body {
   stroke: #ccc;
   stroke-width: 1.5px;
 }
+
+.zoom {
+    position: fixed;
+    top: 5px;
+    right: 5px;
+}
diff --git a/static/ontology/index.html b/static/ontology/index.html
index eda477c..bdc9d9b 100644
--- a/static/ontology/index.html
+++ b/static/ontology/index.html
@@ -7,6 +7,10 @@
   <title>Ontology Tree</title>
 </head>
 <body>
+  <div class="zoom">
+      <button class="plus">+</button>
+      <button class="minus">-</button>
+  </div>
   <script src="index.js"></script>
 </body>
 </html>
diff --git a/static/ontology/index.js b/static/ontology/index.js
index bcab5a4..d514a4e 100644
--- a/static/ontology/index.js
+++ b/static/ontology/index.js
@@ -51,6 +51,22 @@ function resize() {
   update(root);
 }
 
+function zoom(size) {
+    height = size;
+    tree.size([height, width]);
+    svg.attr("width", width).attr("height", height + margin.top + margin.bottom)
+    document.querySelector('svg').attributes.height.value = height + margin.top + margin.bottom
+    resize()
+}
+
+
+document.querySelector('.zoom button.plus').addEventListener('click', function(event) {
+    zoom(height*1.5)
+})
+document.querySelector('.zoom button.minus').addEventListener('click', function(event) {
+    zoom(height/1.5)
+})
+
 
 function get_color(d) {
   if (d.children || d._children) {
@@ -95,7 +111,8 @@ function update(source) {
       })
       .text(function(d) {
           if (d.children || d._children) {
-              return d.name;
+              //return d.name;
+              return d.name + '(' + (d.children || d._children).length +')';
           }
           return d.name + ' (' + d.size + ')';
       })
