These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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In a gauge chart, this option sets the width of the plot band
stretching along the perimeter. It can be given as a percentage
string, like "10%"
, or as a pixel number, like 10
. The default
value 10 is the same as the default tickLength,
thus making the plot band act as a background for the tick markers.