Does this mean I can have a SIGNATURE in Inbox now? If so, how? (I'm using Safari, so there hasn't been any way that I know of to use a signature, which is the

Does this mean I can have a SIGNATURE in Inbox now? If so, how? (I'm using Safari, so there hasn't been any way that I know of to use a signature, which is the one dealbreaker for me to use Inbox, which I love)