44 Paper Handling
❏ When loading transparencies in the MP tray, insert the short 
edge first and with the printable surface facing up.
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Caution:
Sheets that have just been printed on may be hot.
Envelopes
The print quality of envelopes may be irregular because different 
parts of an envelope have different thicknesses. Print one or two 
envelopes to check the print quality.
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Caution:
Do not use window envelopes unless they are specifically 
designed for laser printers. The plastic on most window envelopes 
will melt when it comes into contact with the fuser.
Note:
Depending on the quality of envelopes, the printing environment, or the 
printing procedure, envelopes might be wrinkled. Make a trial print run 
before you print on a lot of envelopes.
The following table shows important settings you have to make 
when using envelopes.
Paper Source MP tray only (up to 10 envelopes)