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

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

Feel free to search this API through the search bar or the navigation tree in the sidebar.

# series.gantt.borderWidth

The width of the border surrounding each column or bar. Defaults to `1` when there is room for a border, but to `0` when the columns are so dense that a border would cover the next column.

In styled mode, the stroke width can be set with the `.highcharts-point` rule.