# 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.layoutAlgorithm.gridSize

When `type` is set to the `grid`, `gridSize` is a size of a grid square element either as a number defining pixels, or a percentage defining a percentage of the plot area width.