# 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.sunburst.levels.dataLabels.rotationMode

Decides how the data label will be rotated relative to the perimeter of the sunburst. Valid values are `auto`, `circular`, `parallel` and `perpendicular`. When `auto`, the best fit will be computed for the point. The `circular` option works similiar to `auto`, but uses the `textPath` feature - labels are curved, resulting in a better layout, however multiple lines and `textOutline` are not supported.

The `series.rotation` option takes precedence over `rotationMode`.