# 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.

# plotOptions.xrange.sonification.pointGrouping.algorithm

The grouping algorithm, deciding which points to keep when grouping a set of points together. By default `"minmax"` is used, which keeps both the minimum and maximum points.

The other algorithms will either keep the first point in the group (time wise), last point, middle point, or both the first and the last point.

The timing of the resulting point(s) is then adjusted to play evenly, regardless of its original position within the group.