Citizen Systems PPU-231II - Manual (Page 19)

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ESC ! n
[Function] Collectively specifying the printing mode
[Code] <1B>H<21>H
[Range] 0 n 255
[Outline] Printing mode is assigned.
Bit Function
Value
0 1
0 Character Font Font A Font B
1 Undefined
2 Undefined
3 Emphasis Canceled Specified
4 Double height Canceled Specified
5 Double width Canceled Specified
6 Undefined
7 Underline Canceled Specified
[Caution] • 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 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.
[Default] n = 0
[See Also] ESC E, ESC –, GS !