Brother RJ-4040 - Manual (Page 29)

ESC/P Command Reference
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5. Control Command Details
ESC k Select font
ASCII: ESC k n
Decimal: 27 107 n
Hexadecimal: 1B 6B n
Parameters
0≤n≤4, 9≤n≤11
Description
 Selects the font.
Bitmap Fonts Outline Fonts
n=0 Reserved n=9 Letter Gothic (fixed pitch)
n=1 Letter Gothic Bold (fixed pitch) n=10 Reserved
n=2 Reserved n=11 Helsinki (proportional pitch)
n=3 Helsinki (proportional pitch)
n=4 Reserved
 The default value is n=1 (Letter Gothic Bold (fixed pitch)).
 If the font is changed from a bitmap font to outline font, the character size is changed to the default setting
(28dots).
 If the font is changed from an outline font to bitmap font, the character size is changed to default setting
(24 dots).
 Propotional pitched Helsinki is forced to be selected when a character assigned from 0x80 to 0xFF in the
Japanese character code table is used.