I like the idea of eventually controlling this field.  Right now I have it set up to allow entry on the fly because I can't find a place to enter a list of ship via codes.  Am I missing the program or is it not available yet?

No it was not in the menu--  I added it.
 
Since there do not seem to be any instructions maybe you could tell me what the "Company Code" is used for.  It seems to be just a truncated form of the ship via code.  I am assuming that this would be the freight company?  So multiples of this field are okay?