Citizen Systems iDP-3550 - Manual (Page 104)

ESC "!" n
[Function] Setting the print mode batch
[Code] <1B>H <21>H n
[Range] 0
≤
n
≤
255
[Outline] Sets the print mode. "n" (Each bit) has the following meanings.
Values
Bit Function
0 1
0 Undefined
− −
1 Undefined
− −
2 Undefined
− −
3 High-lighting Canceled Specified
4 Double height Canceled
Specified
(Graphic Type)
5 Double width Canceled Specified
6 Undefined
− −
7 Underline Canceled Specified
[Caution] The entire character print width is underlined, but the portion skipped by HT is not. If both
double height and double width are selected, the characters will be quadrupled. If the double
width characters are selected, some dots may not be printed depending on the preceding one.
Double height is selectable only for graphic type.
[Default] n = 0