Epson C2600/2600 Owner's Manual page 249

Note:
Settings or data saved in the printer's RAM (such as downloaded fonts)
may be erased when you change the emulation mode.
GL Mode
Specifies whether the printer uses a direct emulation of the GL/2
plotter language, or the HP LaserJet 4 emulation of GL/2.
Scale
Specifies whether the output from the software is scaled. The scale
factor is based on the output paper size of the application.
Origin
Specifies whether the logical origin of the "plotter" is the corner
or the center of the paper.
Pen
Allows you to choose a pen which you can then set the thickness
for in the Pen 0 through 6 item. The LJ4GL2 mode supports two
pens (0 and 1), while the GLlike mode supports seven pens (0
through 6).
End
Specifies the way in which lines end.
Join
Specifies the way in which lines are joined.
Pens 0 through 6
Allows you to set the thickness of the pens used to make the
printout. Pen 0 and Pen 1 are available in the LJ4GL2 mode, and
Pen 0 through Pen 6 are available in the GLlike mode.
Using the Control Panel
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