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When active a property's minimum and maximum values are calculated by RealFlow | Cinema 4D Maya automatically. The colour gradient from from → "Particle Color" is adjusted to this range. When disabled you will be able to define your own range, e.g. for enhancing colour contrast. Particles with values smaller than “Min Range” or greater than “Max Range” will be displayed with the same gradient colours.
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If “Automatic Range” is unchecked you can define a custom value. All particles with values smaller than “Min Range” will be displayed with the same gradient colour.
Max Range
If “Automatic range” is unchecked you can define a custom value. All particles with values greater than “Max Range” will be displayed with the same gradient colour.