Epson LX-810 User Manual page 60

To change the paper thickness setting, follow these steps.
1. Make sure the printer is turned off. Then remove the printer
cover.
WARNING: If the printer has just been in use, the print
head may be hot. Allow it cool before touching it.
2. Select the paper thickness you want according to the table on
the next page. For normal use, the lever should always be set
to position 2 on the scale.
Printing on Special Paper
Paper Handling
2-23