legendMarkerBorderThickness: Number

Sets the thickness of the legend’s Marker Border in pixels.

• There is no border in Legend Marker Type “cross”, hence legendMarkerBorderThickness doesn’t apply when legendMarkerType is “cross”

var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
 data: [{
   legendMarkerBorderThickness: 2,

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