Ok, but don’t understand. – In Win 10 / PL 4.1.1, I can change / rename (completely) the name of the virtual copy, but it changes the master’s name simultaneosly – and vice versa. I just can’t do it independently as shown in your screenshot. If it’s a bug / another difference between Mac and Win, I don’t know.
My intention would be to keep the master’s name and to add something meaningful to the virtual copy. Because …
I copy all pics from the card to the computer, where I mass rename them,
e.g. “2020-12-20_HappyDay_1234.nef”, sort them out, delete what I don’t need and finally develop them in PL. So, from now on, I keep “2020-12-20_HappyDay_1234” untouched and add someting descriptively to further versions (B&W, online, printversion …).
For consistency I’d like to do the very same with virtual copies, inspite of them only visible in PL / saved as .dop-file …
… as they serve as my new ‘master’ / source when exported.