# 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.

# rangeSelector.buttons.dataGrouping.forced

When data grouping is forced, it runs no matter how small the intervals are. This can be handy for example when the sum should be calculated for values appearing at random times within each hour.