For context I'm an MtF hiring manager at a very small startup. I'm pretty open about being trans to people who know me well but wouldn't feel comfortable stating on our company's website that I'm trans.
In my experience, most people's assumptions seem to be that no one is trans. Upon finding out, it does make some people uncomfortable, though, so if it is a dealbreaker for a new hire, I would rather deal with it sooner rather than later. Is the best time to mention this during the interview or later once an offer is extended? Is it better to bring it up casually or sit down and have a serious talk about it?
Most other questions have focused on a trans person joining a company, but I think the difference here is that I want to figure out how, as a manager, to make my company a great environment for everyone.