Samsung SRP-350 Operator's Manual page 21

GS / m
[Name] Print downloaded bit image.
[Format] ASCII
Hex
Decimal
[Range] 0•m•3, 48•m•51
[Description] Prints a downloaded bit image using the mode specified by m.
m selects a mode from the table below:
m Mode
0, 48 Normal
1, 49 Double-width
2, 50 Double-height
3, 51 Quadruple
GS :
[Name] Start/End macro definition.
[Format] ASCII
Hex
Decimal
[Description] Starts or ends macro definition.
GS B n
[Name] Turn white/black reverse printing mode on/off.
[Format] ASCII
Hex
Decimal
[Range] 0 ≤ n ≤ 255
[Description] Turns on or off white/black reverse printing mode.
When the LSB is 0, white/black reverse printing mode is turned off.
on.
GS H n
[Name] Select printing position of HRI characters.
[Format] ASCII
Hex
Decimal
[Description] Selects the printing position of HRI characters when printing a bar code.
n selects the printing position as follows:
N Printing position
0, 48 Not printed.
1, 49 Above bar code.
2, 50 Below bar code.
3, 51 Both above and below the bar code.
HRI indicates Human Readable Interpretation.
GS / m
1D 2F m
29 47 m
Vertical Dot Density(DPI)
180
180
90
90
GS :
1D 3A
29 58
GS B n
1D 42 n
29 66 n
When the LSB is 1, white/black reverse printing mode is turned
GS H n
1D 48 n
29 72 n
Horizontal Dot Density(DPI)
180
90
180
90