Epson 4500 - Manual (Page 91)

Adjusting the Loading Position
The Loading Position
The loading position is the position of the paper when it has been
loaded automatically by the printer.
This position is important because it determines where the printing
begins on the page. If the printing is too high or too low on the page,
change the loading position using the micro-adjustment feature
described in the next section.
CAUTION:
Never use the platen knob to feed paper except in
case of a paper jam or other paper feeding problem. (If you
need to use the platen knob, make sure the power is off.) If
you need to adjust the loading position, always use the
micro-adjustment feature.
Until the loading position is reset, the printer remembers this position
even if it is turned off, and uses it as a reference point for feeding paper.
The micro-adjustment feature moves the paper in 1/180-inch
increments to make fine adjustments to the loading position. Once you
have used micro-adjustment to change the loading position of
continuous paper, the printer remembers that position even after it is
turned off.
When you use micro-adjustment to change the loading position of
single-sheet paper, however, the printer does not remember this position
after the power is turned off. When the power is turned back on, the
loading position returns to its factory setting.
3-12 Using the Printer