How to Change the Shipping Methods of a listing

[toshimimi]

 The following eBay page states that "Edit the shipping details" is possible.

https://www.ebay.com/help/action?segmentId=19999&topicId=4356&contextid=b4faf904-e373-4358-b78c-a8d7...

I clicked "Revise listing".  Then my Seller Hub page is displayed,  but I cannot find a way to change the shipping methods. I want to change "USPS Parcel Select  Ground " to "USPS Priority Mail".

The "See details " for shipping currently shows  

  "Economy Shipping (USPS Parcel Select Ground" and

  "Standard Shipping (UPS Ground)"

However, I cannot find a way to change these.

[kensgiftshop]

@toshimimi 

If there is an open offer on the item, you won't be able to edit the listing.