title: Highchart - Use a formatter on PlotLine labels
body: <p>I'm using highchart to show some text next to a plot line on the xAxis. I would like to customize each label from a formatter function as it is possible on every other labels in the chart.</p>
  
  <p>I've seen <a href="https://stackoverflow.com/questions/14887513/highcharts-typescript-y-axis-label">another topic on this matter</a> but they're using TypeScript and I don't.</p>
  
  <p>What I'm doing is :</p>
  
  <pre><code>vay chart = new HighChart({
  ...
  xAxis: {
          plotLines: [{
              id: "plotLines",
              zIndex: 15,
              color: myColor,
              width: 1,
              value: theXvalue, //x value where to show the line
              label: {
                  formatter: function () {
                      return " VAL &gt; "+this.value;
                 }
              },
          }]
      },
      ...
  });
  </code></pre>
  
  <p>If I set the 'text' value in the label it shows up and it works like a charm.</p>
  
  <p>Any help to use a formatter for those labels ?</p>