# 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.

# yAxis.events.afterSetExtremes

As opposed to the `setExtremes` event, this event fires after the final min and max values are computed and corrected for `minRange`.

Fires when the minimum and maximum is set for the axis, either by calling the `.setExtremes()` method or by selecting an area in the chart. One parameter, `event`, is passed to the function, containing common event information.

The new user set minimum and maximum values can be found by `event.min` and `event.max`. These reflect the axis minimum and maximum in axis values. The actual data extremes are found in `event.dataMin` and `event.dataMax`.