Kyocera ECOSYS M3645dn Operation Manual page 121

Preparation before Use > Loading Paper
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Pull out the support tray section of the MP tray.
Adjust the multi purpose tray size.
Paper sizes are marked on the multi purpose tray.
Load paper.
Insert the paper along the paper width guides into the tray until it stops.
After removing new paper from its packaging, fan the paper before loading it in the multi
purpose tray.
Precaution for Loading Paper (page 3-3)
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