# 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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# plotOptions.xrange.tooltip.pointFormat

The HTML of the point's line in the tooltip. The context is the Point class. Variables are enclosed in curly brackets. Examples of common variables to include are `x`, `y`, `series.name` and `series.color` and other properties on the same form. Furthermore, `y` can be extended by the `tooltip.valuePrefix` and `tooltip.valueSuffix` variables. This can also be overridden for each series, which makes it a good hook for displaying units.

In styled mode, the dot is colored by a class name rather than the point color.