Press the [User Tools/Counter] key.
Press [Tray Paper Settings].
Press [].
Press [Printer Bypass Paper Size].
Press [Custom Size].
If a custom size is already specified, press [Change].
Press [Vertical].
Enter the size of the paper using the number keys, and then press the [] key.
Press [Horizontal].
Enter the size of the paper using the number keys, and then press the [] key.
Press [OK] twice.
Press the [User Tools/Counter] key.
When loading thick paper, specify the paper size and the paper type.