These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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Padding of the min value relative to the length of the axis. A
padding of 0.05 will make a 100px axis 5px longer. This is useful
when you don't want the lowest data value to appear on the edge
of the plot area. When the axis' min option is set or a max extreme
is set using axis.setExtremes(), the maxPadding will be ignored.
Also the softThreshold option takes precedence over minPadding,
so if the data is tangent to the threshold, minPadding may not
apply unless softThreshold is set to false.