Olivetti PG L2140 Operation Manual page 51

Loading Envelopes into the MP (Multi-Purpose) Tray
MP Tray
Support Tray Section
of the MP Tray
3
Close the rear cover.
1
Fan the envelopes, then tap it on a level surface to avoid envelope
jams or skewed printing.
2
Pull the MP tray towards you until it stops.
3
Pull out the support tray section of the MP tray.
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Preparation before Use