Esc X Selects Letter Quality Or Draft Printing. (Epson) - Compuprint MDP 30FB Programmer's Manual

Where m defines the pitch:
m = 0 maintains current density
m = 1 sets proportional spacing
m > 5 selects fixed pitch equal to 360/m cpi
This command overrides the current pitch setting.
This command selects the point (default value 10.5) attributes of the font according to
the following formula:
Point size =
n and n define size by point (1 point equals 1/72 inch).
1 2
(point size) x 2
n = INT
2
(point size) x 2
n = MOD
1
The point sizes available are the following: 8, 10, (10.5), 12, 14, 16, 18, 20, (21), 22, 24,
26, 28, 30, 32.
ESC x
Selects Letter Quality or Draft printing. (EPSON)
ASCII Code ESC x n
Hexadecimal Value 1B 78 n
27 120 n
Decimal Value
This command selects either LQ or Draft printing according to the following values:
(n x 256) + n
2 1
2
256
256
57