# Welcome to the Highcharts Maps JS (highmaps) Options Reference

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

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# plotOptions.contour.contourOffset

The offset for contour line positioning. Shifts the contour levels so lines and bands are drawn at `contourOffset + n * contourInterval` instead of `n * contourInterval`.

Example: with `contourInterval: 10` and `contourOffset: 5`, levels are at 5, 15, 25, etc. Use this to align levels with a reference value without changing the data. Non-positive values are treated as 0.