Lexmark All in One Printer - Manual (Page 62)

62 Loading Print Materials
Loading the envelope feeder The envelope support has three positions:
• Fully closed (pushed in toward printer) for short envelopes
• Extended to the middle position for medium-length envelopes
• Fully open (extended to its full length) for long envelopes
1 Gently adjust the envelope support for the size you are
loading.