Epson DFX-9000 Reference Manual page 94

Right margin
This setting allows you to set the margin (in columns) from the
right edge. The margin is set in columns of 10 cpi, regardless of
the pitch that is set.
Platen gap
This setting allows you to set the paper thickness. When you select
Auto, the printer automatically adjusts to the thickness of the
paper loaded. If you want to set it manually, select 0 to 14. When
using overlapping multi-part forms, select 0 to 14 according to the
paper thickness you use.
Auto tear off
When auto tear off is on and you are using continuous paper with
the front or rear push tractor, the printer automatically advances
the paper perforation to the tear-off position, where you can easily
tear off the printed page(s). When the printer receives data again,
it automatically moves the paper back to the top-of-form position
and starts printing, so you can use all of the next page.
When auto tear off is off and you are using continuous paper with
the front or rear push tractor, you need to move the perforation
to the tear-off position manually by pressing the Tear Off and
Micro Feed buttons. See "Tearing Off the Printed Pages" on page
34 for more information.
Auto line feed
When auto line feed is on, the printer accompanies each carriage
return (CR) code received with a line feed (LF) code.
Print direction
You can select bidirectional printing (Bi-D) or unidirectional
printing (Uni-D). Printing is normally bidirectional; however,
unidirectional printing allows for precise vertical printing
alignment.
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Control Panel