# 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.style

CSS styles for the tooltip. The tooltip can also be styled through the CSS class `.highcharts-tooltip`.

Note that the default `pointerEvents` style makes the tooltip ignore mouse events, so in order to use clickable tooltips, this value must be set to `auto`.