# JS API Reference

# Welcome to the Highcharts JS 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.

# plotOptions.cylinder.zones

An array defining zones within a series. Zones can be applied to the X axis, Y axis or Z axis for bubbles, according to the `zoneAxis` option. The zone definitions have to be in ascending order regarding to the value.

In styled mode, the color zones are styled with the `.highcharts-zone-{n}` class, or custom classed from the `className` option (view live demo).