# 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.xAxis.uniqueNames

Applies only when the axis `type` is `category`. When `uniqueNames` is true, points are placed on the X axis according to their names. If the same point name is repeated in the same or another series, the point is placed on the same X position as other points of the same name. When `uniqueNames` is false, the points are laid out in increasing X positions regardless of their names, and the X axis category will take the name of the last point in each position.