# 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.

# plotOptions.geoheatmap.point.events.mouseOver

Fires when the mouse enters the area close to the point. One parameter, `event`, is passed to the function, containing common event information.

Returning `false` cancels the default behavior, which is to show a tooltip for the point.