I'm thinking there may have been a mid-production stream model change or revision, which might be why the manual I looked up does not include more "Arc Control" related info.
Get the serial# from your power source and wire feeder, input them separately in this search function -
https://www.millerwelds.com/support/manuals-and-partsand this will pull up the right manuals.
If the info your looking for is not in there, give Miller a call.
Tim