# 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.

# lang.accessibility.announceNewData

Default announcement for new data in charts. If addPoint or addSeries is used, and only one series/point is added, the `newPointAnnounce` and `newSeriesAnnounce` strings are used. The `...Single` versions will be used if there is only one chart on the page, and the `...Multiple` versions will be used if there are multiple charts on the page. For all other new data events, the `newDataAnnounce` string will be used.