To do the sign for "Pittsburgh," brush your dominant "F" hand down along your
opposite upper chest area twice. (If you are right handed.)
The contact is with the tips of the index finger and thumb.
Note that you twist your wrist somewhat in this sign. You start
almost palm-backward and you end palm down.
You can learn
American Sign Language (ASL) online at American Sign Language University ™
ASL resources by Lifeprint.com © Dr. William Vicars