FusionCharts - Using annotations to add a callout to a column

Created using FusionCharts Suite XT - www.fusioncharts.com

HTML

<script src="http://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<script src="http://static.fusioncharts.com/code/latest/fusioncharts.charts.js"></script>
<script src="http://static.fusioncharts.com/code/latest/themes/fusioncharts.theme.fint.js"></script>

<div id="chart-container">FusionCharts will render here</div>

JavaScript

FusionCharts.ready(function() {
  var revenueChart = new FusionCharts({
    type: 'gantt',
    renderAt: 'chart-container',
    id: "myChart",
    width: '750',
    height: '500',
    dataFormat: 'json',
    dataSource: {
    "chart": {
        "dateformat": "mm/dd/yyyy",
        "caption": "Social Media Optimization",
        "subcaption": "Typical Steps Involved",
        "theme": "fint",
        "canvasBorderAlpha": "40"
    },
    "categories": [
        {
            "category": [
                {
                    "start": "08/01/2014",
                    "end": "08/31/2014",
                    "label": "Aug '14"
                },
                {
                    "start": "09/01/2014",
                    "end": "09/30/2014",
                    "label": "Sep '14"
                },
                {
                    "start": "10/01/2014",
                    "end": "10/31/2014",
                    "label": "Oct '14"
                },
                {
                    "start": "11/01/2014",
                    "end": "11/30/2014",
                    "label": "Nov '14"
                },
                {
                    "start": "12/01/2014",
                    "end": "12/31/2014",
                    "label": "Dec '14"
                },
                {
                    "start": "01/01/2015",
                    "end": "01/31/2015",
                    "label": "Jan '15"
                },
                {
                    "start": "02/01/2015",
                    "end": "02/28/2015",
                    "label": "Feb '15"
                },
                {
                    "start": "03/01/2015",
                    "end": "03/31/2015",
                    "label": "Mar '15"
                }
            ]
        }
    ],
    "processes": {
        "fontsize": "12",
        "isbold": "1",
        "align": "right",
        "process": [
            {
                "label": "Identify Customers"
            },
      ...