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10 Installing Optional Accessories
6. Tap [Device] .
7. Tap [System Settings] > [Other Settings].
8. Tap [Tray 1 Configuration].
9. Tap [Standard Tray].
10. Press the <Home> button.
11. In the printer driver at the [Configuration] tab, configure one of the following settings.
Under [Bi-Directional Communication], click [Get Information from Printer].
Set [Installable Options...] > [Envelope/Postcard Tray] to [Not Installed].
Refer
For the change method, refer to "Printing on Envelopes" (P.64).