Copy external URL from the design

Hi there,
cannot find answer for my simple question: how do I, as a developer, copy URL from a link in the (readonly) design? When I select the link, it shows the URL with Open Link button, it’s not possible select & copy the link there.
The only way I found, is to copy the design to draft, than there is the Edit button and copy from there. Well, I don’t want to edit, I just want to copy.
(FAQ: why not copy the URL from the opened browser window? Because often the URL differs, e.g. if you use link shorteners).
Michal