# 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.flowmap.opacity

The opacity of all the links. Affects the opacity for the entire link, including stroke. See also fillOpacity, that affects the opacity of only the fill color.