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When printing on envelopes, load envelopes in bypass tray or Tray 1, and then follow the procedure below to specify envelope type and thickness.
Press the [User Tools] key, and then select the setting items using the [
] or [
] key.
Select [Tray Paper Settings] 
Press [OK]
Select [Printer Bypass Paper Size] or [Paper Size: Tray 1] Press [OK]
Select the envelope type Press [OK]
Select [Paper Type: (tray name)] Press [OK]
Select [Envelope] Press [OK]
Press [Escape]
Select [Maintenance] Press [OK]
Select [Envelope Setting] Press [OK]
Select the source tray for which you want to change the paper thickness Press [OK]
Select the paper thickness Press [OK]
