Canon FAX L1000 Service Manual page 385

3. Before you load a stack of paper into the paper cassettes, tap the
leading edge of the paper stack on a flat surface so that the edges
are evenly aligned.
4. Place the stack of paper in the paper cassettes with the print side
facing down. Insert the stack of paper so that it fits neatly to the
back of the paper cassettes.
When loading 500 sheets into the paper cassettes, divide the stack in two
evenly-sized stacks, then load each stack separately.
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FAX-L1000 Chapter 5: Appendix