# 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.

# 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.