Brother QL-720NW - Manual (Page 34)

ESC/P Command Reference
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5. Control Command Details
ESC M Apply elite pitch (12 cpi)
ASCII: ESC M
Decimal: 27 77
Hexadecimal: 1B 4D
Parameters
None
Description
 Prints the subsequent text with the elite pitch (12 characters/inch).
 The character spacing is 25 dots (=300 dots/12 characters).
 If the character width is 25 dots or less, the character spacing is specified as 25 minus the character width.
 If the character width exceeds 25 dots, the character spacing is specified as the character width.
(The spacing between characters is 0 dot.)
In this case, the pitch does not exactly equal the elite pitch.
 With double-width characters, the character spacing is doubled (50 dots).
 With half-width characters, the character spacing is halved (13 dots).
 When the character spacing is changed with ESC SP, the setting is updated.
 This command is invalid when proportional pitch is selected.
 In outline fonts, the spacing between characters is 0 dot.
Example
For a 24-dot font at full width:
Ａ Ｂ
1 dot
24 dots
Ａ
40 dots
2 dots
Full width Double width
Ｂ