Samsung M267x series User Manual page 286

Printing problems
Condition
The machine does not Paper size and paper size setting do not match.
print special-sized paper,
such as billing paper.
The printed billing paper The paper type setting does not match.
is curled.
Possible cause Suggested solutions
Set the correct paper size in the Custom in Paper tab in Printing Preferences (see
"Opening printing preferences" on page 54).
Change the printer option and try again. Go to Printing Preferences, click Paper tab,
and set type to Thick (see "Opening printing preferences" on page 54).
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6. Troubleshooting