Citizen CBM1000II Command Reference Manual page 21

ESC ! n
[Function]
[Code]
[Range]
[Outline]
[Caution]
[Default]
[See Also]
Collectively specifying the printing mode
<1B>H<21>H<n>
0 n 255
Printing mode is assigned.
Bit Function
0 Character Font
1 Undefined
2 Undefined
3 Emphasis
4 Double height
5 Double width
6 Undefined
7 Underline
• With double height and double width being specified
simultaneously, quadruple characters are created.
• An underline is attached to the full character width, which,
however, is not attached to the part having been skipped by
the horizontal tab. Neither is it attached to 90 -right-turned
characters.
• The underline width is as specified by the <ESC –> command.
(The default setting is 1 dot width.)
• In case characters with different vertical magnification ratios
coexist on the same line, they are printed on the same base
line.
n = 0
ESC E, ESC –, GS !
— 19 —
Value
0 1
Font A Font B
Canceled Specified
Canceled Specified
Canceled Specified
Canceled Specified