# 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.label.formatter

Callback function to format each of the series' labels. The `this` keyword refers to the series object. By default the `formatter` is undefined and the `series.name` is rendered.