# 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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# series.xrange.accessibility.point.valueDescriptionFormat

Format to use for describing the values of data points to assistive technology - including screen readers. The point context is available as `{point}`.

Other available context variables include `{index}`, `{value}`, and `{xDescription}`.

Additionally, the series name, annotation info, and description added in `point.accessibility.description` is added by default if relevant. To override this, use the accessibility.point.descriptionFormatter option.