Epson 4500 - Manual (Page 53)

Using Single Sheets
4. Adjust the right edge guide to match the width of your paper. Then
slide the paper down between the edge guides until it meets
resistance.
5. Press the LOAD/EJECT button once to load the paper automatically.
CAUTION:
Never advance the paper using the platen knob
while the printer is turned on. If the platen turns without
firmly. Then press the LOAD/EJECT button again.
Paper Handling 2-5