# 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.dateTimeLabelFormats.millisecond.range

When `false`, this time unit is treated as a point in time rather than a range. In Gantt charts, when grid axis is enabled, point-in-time ticks get left-aligned in the grid cell by default.