Citizen Systems iDP3240 - Manual (Page 123)

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GS B n
[Function] Specifying/Canceling the black/white inverted printing
[Code] <1D>H<42>H<n>
[Range] 0 n 255
[Outline] This command specifies or cancels the black/white inverted
printing.
n0 Function
0 The black/white inverted printing is canceled.
1 The black/white inverted printing is specified.
[Caution] • Number “n” is only valid in the lowest bit.
• The black/white inversion works on internal and downloaded
characters.
• The black/white inversion works also on the right spacing of
characters defined by ESC SP.
• This command does not affect the bit image, downloaded bit
image, bar code, HRI characters, or the skip area specified by
HT, ESC $, or ESC \.
• This command does not affect the space between lines.
• Underlining, even if specified, is not applied to black-to-white
reversed characters; the underline setting, however, remains
unchanged.
[Default] n = 0