# JS API Reference

# Welcome to the Highcharts JS 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.xrange.dataLabels.z

The Z index of the data labels. The default Z index puts it above the series. Use a Z index of 2 to display it behind the series.