# Welcome to the Highcharts Gantt JS (gantt) Options Reference

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

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# series.gantt.borderRadius

The corner radius of the border surrounding each column or bar. A number signifies pixels. A percentage string, like for example `50%`, signifies a relative size. For columns this is relative to the column width, for pies it is relative to the radius and the inner radius.