# Welcome to the Highcharts Gantt JS (gantt) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

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# 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.