# 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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# navigator.yAxis.categories

If categories are present for the xAxis, names are used instead of numbers for that axis.

Since Highcharts 3.0, categories can also be extracted by giving each point a name and setting axis type to `category`. However, if you have multiple series, best practice remains defining the `categories` array.

Example: `categories: ['Apples', 'Bananas', 'Oranges']`