# 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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# exporting.buttons.contextButton.symbol

The symbol for the button. Points to a definition function in the `Highcharts.Renderer.symbols` collection. The default `menu` function is part of the exporting module. Possible values are "circle", "square", "diamond", "triangle", "triangle-down", "menu", "menuball" or custom shape.