I have a list of Alt-Codes for special characters in DOS. As I was holding down the Alt key and typing in random numbers to see what I could produce, somehow a table popped up with the special characters listed. It also displayed the 3-digit number for each symbol as you moved around in the box. I don't believe this is a part of the software I was in at the time. It seems to be a feature built into DOS, or the Edit command, or something like that.

Does anyone know the key command to get this list of special characters again?