Canon BJC-4400 - Manual (Page 37)

Paper Handling
Chapter 3 Paper Handling 3-11
❍ Do not try to load paper into the sheet feeder beyond the paper
limit mark ( ) or the tab on the right side of the sheet feeder;
stacking too much paper may cause paper feeding or printing
problems.
❍ Make sure there are no gaps between the stack of paper and the
paper guide nor the right edge of the sheet feeder.
TAB
D
NO GAP HERE
NO GAP HERE