# 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.heatmap.stickyTracking

Sticky tracking of mouse events. When true, the `mouseOut` event on a series isn't triggered until the mouse moves over another series, or out of the plot area. When false, the `mouseOut` event on a series is triggered when the mouse leaves the area around the series' graph or markers. This also implies the tooltip. When `stickyTracking` is false and `tooltip.shared` is false, the tooltip will be hidden when moving the mouse between series.