Follow-up:
Just called Simmons. Seems they're moving everything from Georgia to California right now, so they have no manuals available for customers. The young lady suggested I try back at the end of the month.
BTW, I tracked down some commentary on the A E D markings. The two horizontal lines are used for range finding on Antelope, Elk, or Deer; adjust your magnification until the lines bracket the chest, then read the range off the mag dial for the animal you've just ranged. Then you can adjust the turret, which has been previously calibrated.
Don