Epson 4500 - Manual (Page 93)

Adjusting the Loading Position
3. Press the FORM FEED button to feed the paper forward or the LINE
FEED button to feed the paper backward.
Note: When the paper reaches
the
factory-set loading position,
the printer beeps and micro-adjustment feeding pauses for a
moment before continuing. You can use this factory setting as a
reference point when adjusting the printer’s loading position.
When the paper reaches either the minimum or maximum top
margin, the printer beeps and the paper stops moving.
3-14 Using the Printer