# 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.

# exporting.buttons.contextButton.theme

A configuration object for the button theme. The object accepts SVG properties like `stroke-width`, `stroke` and `fill`. Tri-state button styles are supported by the `states.hover` and `states.select` objects.