Garmin help, please

[Mr. Pink]

I just bought a 530 for the girlfriend, and I'm trying to figure out how to do that hack I did on my 810 that enables one to write "If you find this, contact me at this email and phone number" and this message appears during startup. It's been a while, I totally forgot how to do it or save the link. It appeared on that fellow's blog/website who reviewed Garmin devices for bikes. Forget his name, too.