Citizen Systems iDP-3550, iDP-3551 user manual ESC L n1 n2 m1 m2, ESC h n

ESC "L" n1 n2 m1 m2 ...				(Graphic Type)
[Function]	Specifying the 8-dot double density bit image
[Code]	<1B>H <4C>H n1 n2 m1 m2 ...
[Range]	1 ≤ n1 + 256 × n2 ≤ 360 (DP654 mechanism)
	1 ≤ n1 + 256 × n2 ≤ 400 (DP657 mechanism)
[Outline]	This command prints the 8-dot double density (half-dot print) bit image. Printing will be
	unidirectional. The surplus data exceeding the printable quantity in one line will be ignored.
	The printer will automatically return to the character mode after printing the bit image.
	The relations between the printing head pin numbers and the data are the same as the 8-dot
	standard density bit image command, <ESC> "K.". When printing the double density bit
	image, the horizontally adjacent dots cannot be printed.
ESC "h" n				(Graphic Type)
[Function]	Specifying/Canceling the double height character
[Code]	<1B>H <68>H n
[Outline]	The data following this command is printed in double height characters, except the bit image
	mode <ESC> "K" and <ESC> "L". In combination with the <SO> command, this command
	can print double height, double width characters.
	It cannot be combined with the inverted character command, <SI>. The double height
	characters and ordinary characters shall be bottom-justified.
		n	Double height character command
		0	Deselects
		30
		1	Selects
		31