Adjusting The Paper Position - Epson DFX-9000 Reference Manual

The Tractor Select indicator changes to green. The paper is now
loaded to the top-of-form position. If it looks like the printing
will start too high or low on the page, adjust the paper position
as described below.

Adjusting the Paper Position

You can adjust the top-of-form position as well as the printing
position at any point on the page by using the Micro Feed, and
Top of Form buttons. The printer then remembers the new
top-of-form position. When you use the optional pull tractor,
you can adjust the paper position as described below.
Note:
The printing position (based on the top-of-form position) is controlled
by your software. To change the print position, adjust your software's
print settings. Use the following procedure only if your software does
not allow print position adjustment.
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Paper Handling