Tally Genicom Matrix Printer manual CSI 3 z, CSI 4 z

Line Density	6 lpi						CSI 3 z
Line Density	8 lpi						CSI 4 z
Data Structure	ASCII		CSI	"3"	"z"	[C]	line density 6 lpi (= line spacing 1/6 inch)
	hex.		9B	33	7A
	dec.		155	51	122
	ASCII		CSI	"4"	"z"	[C]	line density 8 lpi (= line spacing 1/8 inch)
	hex.		9B	34	7A
	dec.		155	52	122
Description	These sequences set the line spacing to 1⁄6 inch (6 lpi line density) or 1⁄8 inch (8 lpi line
	density).
	Note that changing the line spacing also changes the number of lines per page.
	Changing of line spacing does not affect the current vertical tab stops or form length.
Example	10 REM		line spacing
	20	LPRINT CHR$(27);"[4z";
	30	LPRINT "these two lines are printed with"
	40	LPRINT "a spacing of 1/8 inch"
	50	LPRINT
	60	LPRINT CHR$(27);"[3z";
	70	LPRINT "these two lines are printed with"
	80	LPRINT "a spacing of 1/6 inch"
	90	END

Line Spacing 25