Font type:
1 = normal
2 = bold
3 = 42 characters long
4 = double height
5 = double width
6 = italics
7 = length 42, double height
8 = length 42, bold
9 = length 42, bold, double height
C = normal, used for printing the customer in the tax invoice
P = normal, used to print the return receipt number in a credit note
B = normal, used for printing the customer ID (Scontrino Parlante)