Brother HL-7050 Series User Manual page 244

Bar Code, expanded character, line block drawing and box
drawing
n = 's0' or 'S0
n = 's1' or 'S1
n = 's3' or 'S3
This parameter selects the bar code style as above. When the EAN
8, EAN 13, UPC-A, Code 128 or EAN 128 bar code mode is selected,
this bar code style parameter is ignored.
Expanded Character
'S'
0 = White
1 = Black
2 = Vertical stripes
3 = Horizontal stripes
4 = Cross hatch
For example 'S' n1 n2
n1 = Background fill pattern
n2 = Foreground fill pattern
If 'S' is followed by only one parameter, the parameter is a
foreground fill pattern.
Line block drawing & box drawing
''S''
1 = Black
2 = Vertical stripes
3 = Horizontal stripes
4 = Cross hatch
Bar Code
n = 'mnnn' or 'Mnnn' (nnn = 0 ~ 32767)
This parameter shows the bar code width. The unit of 'nnn' is a
percentage.
3: 1 (default)
2: 1
2.5: 1
A - 45