Epson DFX-9000 Reference Manual page 31

4. Use the Micro Feed buttons to feed the paper to the desired
top-of-form position. The letter "A" on the ribbon protector
shows you where the bottom edge of your first line of text will
print. This position is based on the first printable line of text.
If your software inserts a top margin of five lines, your text
will actually print five lines below the top-of-form position.
5. Press the Top of Form button again to exit and save your new
top-of-form position. Then close the top cover.
Note:
If you enter top-of-form mode right after loading paper, you can set the
loading and top-of-form positions at the same time. (When you use the
optional pull tractor, you cannot adjust the loading position.)
Paper Handling
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