Dell 1250 Color User Manual page 39

7 Before loading the print media, flex the sheets back and forth, and then
fan them. Straighten the edges of the stack on a level surface.
8 Load print media on the MPF with the top edge first and with the
recommended print side facing up.
9 Adjust the width guides until they rest lightly against the edges of the
stack of print media.
Loading Paper
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