We deal a lot with Merchant IDs in our tickets. I love using Labels for this purpose. It's easy to click on Merchant ID "0001" and get every ticket associated with that Merch ID.
I am now building specialized tickets that say "Merch ID to Migrate" (label) to "this Merchant ID", but I want it to populate their values to the same, original Merchant ID label set.
It seems each custom field categorizes its custom label as its own set of labels.
How can I make custom label fields be shared across various or all fields, so when I click on any one of the values (regardless of its custom field origin), I can see all of the tickets that ever used that Merch ID label?