RMA Dispose-To selection

Hello,
questions on RMA Dispose-To selection:

  1. Can we add a selection to RMA Dispose-To dropdown?
  2. I see that Dispose-To selection on Epicor 10.2.300.3 now have 4 options: Job, Fail, Stock, and Return Shipment compared to Epicor 10.1.600.15 which only has 3 options: Job, Fail, Stock. What does Dispose-To “Return Shipment” mean?

Thank you