You can use the manual feed slot in the back of the printer to print on white card stock or matte board up to 1.3 mm (0.051 inch or 51 mil) thick, in the following sizes: letter, legal, or A4 size.
Before you start, remove the paper support. Then turn the printer on. (The printer must be on to load card stock correctly.)
 position. The
 position. The  paper light begins flashing rapidly.
 paper light begins flashing rapidly. 
 
 
 
 
 position. (If the print quality is not satisfactory, try setting the paper thickness lever to the
 position. (If the print quality is not satisfactory, try setting the paper thickness lever to the  position for the next print.)
 position for the next print.)
 
If you're using the manual feed slot to print on paper rather than card stock, set the paper thickness lever to the  position.
 position.
 button to feed the card stock into the printer.
 button to feed the card stock into the printer.
Note: If the  paper light flashes, make sure the paper thickness lever is set correctly, then press the
 paper light flashes, make sure the paper thickness lever is set correctly, then press the  button again.
 button again.
When you're finished printing on card stock, make sure you return the paper thickness lever to the  position.
 position.
Caution: Don't move the paper thickness lever during printing; this could damage your printer.