Epson EPL-N3000 Reference Manual page 364

Resolution
Specifies the printing resolution.
RITech
Turning RITech on produces smoother and crisper lines, text, and
graphics.
Toner Save
When this setting is selected, the printer saves toner by
substituting a gray shade for the black inside of characters. The
characters are outlined in full black on the right and lower edges.
Density
Specifies the printing density.
Image Optimum
When this mode is on, the quality of graphics is reduced. It
reduces the amount of graphics data when the data reaches the
memory limit, allowing complex documents to be printed.
Top Offset
Makes fine adjustments to the vertical printing position of the
page.
Caution:
c
Make sure that the printed image does not extend beyond the edge
of the paper. Otherwise, you may damage the printer.
Left Offset
Makes fine adjustments to the horizontal printing position of the
page. This is useful for fine adjustments.
Functions of the Control Panel
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