How to always show the BCC field in Apple Mail in Yosemite
I've been searching for this through various websites, but the instructions I've found correspond to older OS versions and I cannot find how to do this for Mail in Yosemite.
I would like to be able to see the BCC field in all Mail message windows. I've figured out how to bring up the BCC field while composing an email, but I can not see the field when I review my sent mail.