Epson LQ-860 User Manual page 180

There are two ways to select a font from the module:
With the printer turned off, dial the family number of the font
l
with the rotary switch on the module. When the printer is
turned on, that font becomes the default font if the slot is
selected by pressing the button on the control panel.
Send a software command, ESC k, to the printer to select the
l
family number. See the Command Summary in Chapter 9 for
details.
Proportional spacing is not effective when printing any font in this
module.
Numbers 0, 1, and 9 are not used.
Some fonts may not include all characters shown in the character
tables in the appendix.
Using the Printer Options
5-43