Too Lazy to Walk Outside and Read the Manual ('03 4x4)

I have an '03 4x4 and was wondering how the Full-Time 4-Wheel Drive works.

Do you just hit the button like you do for 4-Lo / 4-Hi?

I tried to register at myford.com to look it up. Apparently, they don't recognize my VIN number.

Weird.

a.