tire pressure alert

What is your question?

does the tire pressure alert go away as soon as the tire is at factory settings? 35 PSI in the front and rear. alert was on when I got an oil change and it was on when I left. I asked about it and was told that Ford models need to be driven for about a mile before it goes away. it's still on. planning on going back tomorrow because they are closed. Just looking for clarification. thanks in advance