Dave, there was a very lengthy thread I started back in 2016 about this (Copy command (or lack of it) - #32 by simoncbevans). It transpired that some things are only possible in the Windows version (like having a dedicated copy icon). Eventually at post 24/25 Steve Baumgartner admitted that I had a point. I think some time after that it was he who actually wrote a bit of code for me that did what I wanted. Unfortunately, it stopped working after SU2019 was issued.
I think my mistake here is in saying there isn’t a Copy command (of the kind I mean) when that may only be true for Mac users.