Compuprint MDP 30FB Programmer's Manual page 10

ESC X Sets left and right margins. (IBM)
ESC X Selects font by pitch and point. (EPSON)
ESC x Selects Letter Quality or Draft printing. (EPSON)
ESC Y Double density dot graphics printing at double-speed graphics (120
virtual dpi). (IBM, EPSON)
ESC Z Quadruple density dot graphics printing (240 virtual dpi). (IBM, EPSON)
FF Advances paper to the top of the next page. (IBM, EPSON)
HT Horizontal Tab. (IBM, EPSON)
LF Line Feed. (IBM, EPSON)
SI Sets condensed printing. (IBM, EPSON)
SO Sets double width printing (one line). (IBM, EPSON)
VT Vertical Tab. (IBM, EPSON)
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