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

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

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# lang.accessibility.navigator.changeAnnouncement

Announcement for assistive technology when navigator values are changed.

Receives `axisRangeDescription` and `chart` as context. `axisRangeDescription` corresponds to the range description defined in lang.accessibility.axis