# 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.

# navigator.xAxis.tickWidth

The pixel width of the major tick marks. Defaults to 0 on category axes, otherwise 1.

In styled mode, the stroke width is given in the `.highcharts-tick` class, but in order for the element to be generated on category axes, the option must be explicitly set to 1.