Before printing, set the paper registered on the user paper type to the paper tray, and then set the paper type already registered. Paper types can be set either from Web Image Monitor or from the printer's control panel.
Log in to Web Image Monitor in administrator mode.
For details about logging in, see Displaying the Printer Configuration Screens Using a Web Browser.
Click [Configuration] on the [Device Management] menu.
Under "Device Settings", click [Paper], and then change the settings as necessary.
Set the paper tray you want to use as a user paper type, and then select the registered paper type.
Click [OK].
Click [Logout].
Quit Web Image Monitor.