# Welcome to the Highcharts Gantt JS (gantt) 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.series.events.mouseOut

Fires when the mouse leaves the graph. One parameter, `event`, is passed to the function, containing common event information. If the stickyTracking option is true, `mouseOut` doesn't happen before the mouse enters another graph or leaves the plot area.