After changing the paper size, specify the paper size using the control panel.
Press the [User Tools/Counter] key.
Press [Tray Paper Settings].
Select a tray from [Tray Paper Size: Tray 1] to [Tray Paper Size: Tray 3] for which you want to change the paper settings.
Select the loaded paper size and feed direction, and then press [OK].
Press the [User Tools/Counter] key.