# 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.

# xAxis.plotLines

An array of lines stretching across the plot area, marking a specific value on one of the axes.

In styled mode, the plot lines are styled by the `.highcharts-plot-line` class in addition to the `className` option.