Xerox WorkCentre Pro 385 User Manual page 370

Straighten the edges on a level surface.
Note: If envelopes jam while printing, try reducing the number of
envelopes in the Automatic Paper Feeder.
For transparencies, refer to the packaging for the transparency stock to
determine the print side. Hold the transparencies by the edges and
avoid touching the print side. Be careful not to scratch or leave
fingerprints on the print side.
Fan the stack of transparencies to prevent feeding failures.
1-16 Getting Started