Epson LQ-850 User Manual page 35

Using Single Sheets
3. Stand the paper guide in an upright position and align the left
edge guide with the arrow on the paper guide. (You may want
to change this position later, depending on the margin settings
of your application program.)
4. Adjust the right edge guide to fit the size of the paper.
5. Slide the paper down between the edge guides until it meets
resistance. At this point, the PAPER OUT light turns off.
2-3