series.legendItem.markers.visibleBoolean|Function

If set to true the chart will display the legend item markers. Defaults to the series options.

Example - hide the legend item markers

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  series: [{
    type: "line",
    name: "Series A",
    data: [1, 2, 3],
    legendItem: {
      markers: {
        visible: false
      }
    }
  }]
});
</script>