# 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.

# chart.zooming.type

Decides in what dimensions the user can zoom by dragging the mouse. Can be one of `x`, `y` or `xy`.

Note: For non-cartesian series, the only supported zooming type is `xy`, as zooming in a single direction is not applicable due to the radial nature of the coordinate system.