Dell M5200 Medium Workgroup Mono Laser Printer - Manual (Page 61)

Extended to the middle position for medium-length envelopes
Fully open (extended to its full length) for long envelopes
1.
NOTICE: Do not place objects on the envelope feeder. Avoid pressing down on it or applying
excessive force.
Lift the envelope weight back toward the printer. It stays in place. 2.
Slide the width guide to the far right. 3.
Flex a stack of envelopes back and forth and then straighten the edges on a level surface. Press down 4.