Sound Field Plug-Ins : SignalTools : SignalTools Level Meters : SignalTools Meter Reference Mark

SignalTools Meter Reference Mark
Dragging the reference mark to a different location on the meter scale adjusts the level of the reference mark for the meter display. The mark is set by default to the reference level for the corresponding meter type.
 
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SignalTools meters also change color to show different ranges of level. The relative range of color automatically adjusts to follow the current Reference Mark setting in all meter types (except Peak+RMS).