Aha - Remedy! You can do shift-CMD-c on MacOS, (prob shift-ctrl-c on win/linux?) and it pops up!Here's a link to a Q that solved it for me, and how to turn on CC or BCC fields by default as well, if that's useful in your #Thunderbird work.Thanks for coming to my self-help workgroup.https://support.mozilla.org/en-US/questions/1368323