Citizen Systems iDP-3550 - Manual (Page 108)

ESC "2"
(Character Type)
[Function] Setting the standard line feed width
[Code] <1B>H <32>H
[Outline] This command sets the following line feed width.
For charactor type:
1/6 inch.
For graphic type: 2/9 inche
ESC "3" n
(Graphic Type)
[Function] Setting the line feed width in minimum pitch increments
[Code] <1B>H <33>H n
[Outline] This command is only effective for graphic type. This command sets the line feed width to
n/9 inch.
[Default] n = 2
ESC "@"
[Function] Initializing the printer
[Code] <1B>H <40>H
[Outline] This command cancels various conditions set after power-on to initializes the printer to the
conditions having existed at power-on. However, the print buffer, input buffer, and external
device drive pulse width are not initialized. The settings of the DIP switch segments are not
re-read.