Datamax E-class E-3202 Programmer's Manual page 22

GS f n : Select printing position of human readable characters
ASCII : GS f n
Hexadecimal : 1D 66 n
Decimal : 29 102 n
n = 0, 1 ,48, 49
This command selects a font for human readable characters used when printing a bar code.
12 x 24 : n = 0 or 48
9 x 24 : N = 1 or 49
The default setting is n=0. Human readable characters are printed at the position specified by GS H.
E-3202 Programmer's Manual 17