# Welcome to the Highcharts Maps JS (highmaps) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

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# plotOptions.mappoint.cluster.events.drillToCluster

Fires when the cluster point is clicked and `drillToCluster` is enabled. One parameter, `event`, is passed to the function. The default action is to zoom to the cluster points range. This can be prevented by calling `event.preventDefault()`.