Oh, I see. Odd that it works differently from selecting text and copying what is displayed. Different from printing too. Print only prints what is displayed.
Any chance this could be set up as a user definable preference in the future? Seems logical to me that this would work as, “what you copy you get on the clipboard”, just like what you tell it to print. Pretty standard Mac behavior that way. Seems like, if you wanted extra stuff to copy then you could use; Edit > Copy Full Tree of Displayed, or some such.
But at least you have shown me a way to make this work. Thanks.