Epson PR9 User Manual page 164

ESC O
This command code specifies the print quality to draft.
Hex (1B 4F)H
Decimal (27 79)D
Octal (33 117)O
ESC R
This command code resets double width print mode.
Hex (1B 52)H
Decimal (27 82)D
Octal (33 122)O
This code can also reset the mode set by code FS p.
Note:
ESC U
This command code sets double width print mode.
Hex (1B 55)H
Decimal (27 85)D
Octal (33 125)O
Code ESC R, ESC g, and ESC < can reset this mode.
Note:
ESC X
This command code sets underline printing.
Hex (1B 58)H
Decimal (27 88)D
Octal (33 130)O
Code ESC Y can reset this mode.
Note:
Appendix B OKI-Emulation Commands
Set Low Noise Print Mode
Reset Double Width Print Mode
Set Double Width Print Mode
Set Underline Print
B-17