Epson LQ-1050X User Manual page 105

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.
Once you have adjusted your paper, the printer remembers this new
loading position. When the printer receives data, the MULTI-PART
light stops flashing.
Using the Printer
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