Citizen Systems iDP-3550 - Manual (Page 88)

ESC "%" n
[Function] Specifying/Canceling the download character set
[Code] <IB>H <25>H n
[Outline] This command selects/deselects the download character set. The download characters cannot
be printed by simply defining them with the above-mentioned ESC & 0 command. To print
them, send this command to the printer.
n Download Character Set
0
30
Deselects
1
31
Selects