More Information - Epson FX-2190 Reference Manual

Note:
To use the tractor in the pull position, you can remove the tractor from
the rear push position and reinstall it in the pull position, or you can
purchase the optional pull tractor unit (C80020✽ for the FX-890,
C80021✽ for the FX-2190) and install it in the pull position.
If you use a push tractor with the optional tractor in the pull
position, you can create a push/pull tractor combination. This
improves the performance of continuous paper, and is
recommended for printing on continuous pre-printed forms. See
"Using two tractors in a push/pull combination" on page 44 for

more information.

You can use the front, bottom, or rear paper slot with the pull
tractor.
Paper slot
front
bottom
12 Paper Handling
Description
If you print on thick paper such as multipart forms or
continuous paper with labels, use the front paper slot
because this paper path is nearly straight. This reduces
the chances of paper jams.
The bottom paper slot has the straightest paper path,
so it is the best slot to use when printing on thick paper,
such as multipart forms or continuous paper with labels.
Note:
When loading paper from the bottom slot, be
sure to use a printer stand with an opening
large enough for the paper to feed through it
without obstruction.