Canon BJC-4300 Series User Manual page 38

Insert the single
sheet.
After printing on thick paper or envelopes, set the paper thickness lever (inside the printer) back to the
left or center position before printing on other paper types.
Slide the paper into the manual feed slot in the back of the printer.
Align the sheet with the left edge of the manual feed slot.
Hold the sheet for about two seconds until it feeds automatically.
The printer will automatically load the paper into position.
4300 Chapter 3 Page 13