Does anyone know how to delete or edit the name or address of a contact that appears on my screen in FaceTime?

Hi Again. Since there were no replies, I decided to explore more deeply and found the solution myself. It involves selecting the contact in VP and then choosing "Info." Then after a few more "clicks" on menu choices, you eventually get a window in which you can add a photo of the contact and details such as first and last name etc. Eventually, you choose "Done" on several successive screens and the blank circle with the phone number on the "People" screen is replaced with a photo and their name. (The phone number that was there earlier disappears.)

I also found that if someone FaceTimes you while you're in VP, a contact for them is automatically added to your "People" menu. Hope this is helpful to anyone else who was having my now-solved problem.