indexLabelFontFamily: String

Sets the Index Label’s Font Family.

Default: “Calibri, Optima, Candara, Verdana, Geneva, sans-serif”
Example: “calibri”, “tahoma”, “verdana”..

var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
 data: [{
  indexLabelFontFamily: "tahoma",

  },
 ]
 .
 .
});
chart.render();