The two now short-cuts aren't documented but they work as advertised:
- b will create a new e-mail with both the CC and BCC fields displayed, while
- d will create a new e-mail with the CC field displayed.
You can't use the short-cuts after you've already created a new e-mail.


You can find them in the updated GMail Keyboard Shortcut graphical cheat sheet.
Cross-posted on 2FatDads at Update to the GMail Keyboard Shortcut graphical cheat sheet
Cross-posted on 2FatDads at Update to the GMail Keyboard Shortcut graphical cheat sheet