Specifications

TH230/TH230+ Programmers Guide
147
GS B
Function: Turn white/black reverse printing mode on/off
Code ASCII:
GS B n
Code HEX: 0x1D 0x42 n
Range:
0 ≤ n ≤ 255
Default:
n = 0
Description: Turns white/black reverse printing mode on or off.
• When the LSB of n is 0, white/black reverse printing mode is turned off.
• When the LSB of n is 1, white/black reverse printing mode is turned on.
Notes:
• The white/black reverse printing mode is effective for all characters
(except for HRI characters).
• When white/black reverse printing mode is turned on, it also affects the
right-side character spacing set by ESC SP.
• When white/black reverse printing mode is turned on, it does not affect
the space between lines.
• When underline mode is turned on, the printer does not underline
white/black reverse characters.
• This command is effective until ESC @ is executed, the printer is reset, or
the power is turned off.
• In white/black reverse printing mode, characters are printed in white on a
black background.