Epson LQ-850 User Manual page 203

ESC ?
Format:
ASCII code:
Decimal:
Hexadecimal:
Comments:
Changes one graphics mode to another. The variable s is a
character (K, L, Y or Z), which is reassigned to a mode m (0-6).
ESC ?
27 63
1B 3F
Reassign Graphics Mode
9-37