         for s2 in s1.values
           do (s2) =>
             @series3Domains[s1.key][s2.key] = maxScale
-
-
-
+  #
+  # Finds the maximum sum of all columns in series 2
+  # and scales it to the maximum height. All other columns
+  # are scaled relatively.
   buildSeriesDomains_count: =>
     maxSum = 0
     for s1 in @_data

  resetWidth: ->
    @widenChart ZVG.BasicChart.prototype.width

  render: (renderMode = 'percentage') ->
    @renderMode = renderMode
    @resetWidth()

    @renderSeries2Labels()
    @initializeY()
    @initializeLabels()
    @renderSeries3()
    @renderSeries3Labels()
    @renderLegend()
