score:0

Accepted answer

you can change the font-size title style, after click on download button, in settitle method:

var charts = highcharts.charts;

charts.foreach(function(chart){
  chart.settitle({
    style: {
      fontsize: '32px'
    }
  });
}); 

live demo: http://plnkr.co/edit/dpfulmboa8vjk1vez5nd?p=preview

api: https://api.highcharts.com/class-reference/highcharts.chart#settitle


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