HP DMXTM 400/430 Operator's Manual page 55

Some of the data will need to be re-entered. Use the DEL key,
home key or arrow keys to change any information. If the
Printer does not allow you to enter as many characters as you
need, try backing up with the arrow keys and change the font
size.
For special font X, enter the required information as explained
in the following examples:
Note:
DMX 400/430 Operator's Manual
Creating Labels Using Internal Batach Software
Lines: Lhhhvvv
L: "L" specifies line drawing
hhh: horizontal width of line
vvv: vertical height of line
Lines:
l:
hhhh:
vvvv:
Reverse printing is accomplished by
printing a very high, or wide solid line. Text
placed at the same coordinates (inside the line)
is reversed with white letters on a black
background.
Boxes:
B:
hhh:
vvv:
bbb:
sss:
Boxes: bhhhhvvvvbbbbssss
b:
hhhh:
vvvv :
bbbb:
ssss:
lhhhhvvvv
"l" specifies line drawing
horizontal width of line
vertical height of line
Bhhhvvvbbbsss
"B" specifies box drawing
horizontal width of box
vertical height of box
thickness of bottom and top box edge
thickness of sides of box
specifies box drawing
horizontal width of box
vertical height of box
thickness of bottom and top box edges
thickness of sides of box
45