# 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.useHTML

Use HTML to render the contents of the tooltip instead of SVG. Using HTML allows advanced formatting like tables and images in the tooltip. It is also recommended for rtl languages as it works around rtl bugs in early Firefox.