8900 Series Printer Technical Reference Manual

TI Model 880 Printer Emulation 4-31
Invoke G1 Font as GR
Escape sequence: ESC k
Hexadecimal: 1B 6B
Invoke G2 Font as GR
Escape sequence: ESC 1
Hexadecimal: 1B 6C
Invoke G3 Font as GR
Escape sequence: ESC m
Hexadecimal: 1B 6D