In Outlook, how do I inspect the headers?

Factual Questions
1

I can do that with my online mail, but when I read it via Outlook the headers always seem to be kept from me. (It’s even a struggle just to find out the real email address of the sender, not just their nickname. )

2

Right-click on the message and select Options.

3

Well no wonder I couldn’t find it!
It’s not an option alt all, is it? A property, tho. That’s where it should have been.

Thanks for helping me find it.