Citizen iDP-3210 User Manual page 55

(25) specifying/Canceling Inverted Characters
Code : [1B]h + [7B]h + n
* {0 n FF}
Specifying/canceling inverted characters.
l
"n" is valid only for the lowest bit (n0).
l
Bit n (n0) means the followings.
n0
l
This is valid only when this is specified at the beginning of a line.
l
The printing example is shown below.
l
The initial value of n is "0".
When inverted characters
have been canceled:
CITIZEN
Data is described in Hex code.
0 Canceling inverted characters.
1 Specifying inverted characters.
Condition
When inverted characters
have been assigned:
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iDP-3210 User's Manual