How do I sponsor a friend to join hive?

I have a good friend overseas I want to join hive. It says I need to sponsor him, which I'm happy to do! Can anyone show me how to do that?

He's been a friend since my old FB days, and I want to bring him to grown up Blockchain postings. Sadly, I have no idea how to do that; my bad, LOL!

Any information will be appreciated.

Here is what I'm asking about:

The Message at the very bottom suggests that I have to sign him up for him to reach hive. I already decided I'd transfer enough hive to get him past the Resource Credit lockdown problem, but I have to get him here first!