       <p><%= annotationType %></p>
       <p>DataSet: <%= dataSetName %></p>
       <p>Viewport width: <%= chooseUnit(zoomLevel) %></p>
+      <p>Total number of trees: <%= treeCount %></p>
     </div>
   """)
 


    @listenTo(@model.flycam3d, "changed", @render)
    @listenTo(@model.flycam, "zoomStepChanged", @render)


  serializeData : ->

    return {
      annotationType : @model.get("tracingType")
      zoomLevel : @calculateZoomLevel()
      dataSetName : @model.get("dataset").get("name")
      treeCount : @model.skeletonTracing.trees.length
    }


