This will show you a keyboard layout. You may then scroll down the list looking for 'PA2', etc. The 'assigned key' will be in the right-hand column. This will show you a keyboard layout. Look on the keyboard layout for a key marked 'PA2', etc.
Function keys are accessible via the pull down 'Function Key's menu.
If you prefer to key in function keys from the keyboard, contact Computer Services at 777-1800 for a printed TN3270 keyboard map.