# 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.

# series.mapbubble.colorKey

Determines what data value should be used to calculate point color if `colorAxis` is used. Requires to set `min` and `max` if some custom point property is used or if approximation for data grouping is set to `'sum'`.