Citizen Systems iDP-3550 - Manual (Page 75)

DC4
[Function] Canceling the double width character
[Code] <14>H
[Outline] This command deselects the double width characters set with SO. The data following this
command will be printed in ordinary characters.
ESC "E"
[Function] Specifying the highlight character
[Code] <1B>H <45>H
[Outline] The data following this command is printed in highlight (double) characters. The highlight
characters remain valid until the highlight character deselection command is entered.
ESC "F"
[Function] Canceling the highlight character
[Code] <1B>H <46>H
[Outline] This command deselects the highlight characters set with ESC "E". The data following this
command will be printed in ordinary characters.