# 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.bubble.zThreshold

When displayNegative is `false`, bubbles with lower Z values are skipped. When `displayNegative` is `true` and a negativeColor is given, points with lower Z is colored.