# Welcome to the Highcharts Maps JS (highmaps) 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.

# legend.bubbleLegend.labels.formatter

Available `this` properties are:

- `this.value`: The bubble value.

- `this.radius`: The radius of the bubble range.

- `this.center`: The center y position of the range.