Make sure that you register the paper size and type on the screen displayed when you load paper. The printer informs you when the registered information and print settings differ. This prevents you from wasting paper and ink by making sure you are not printing on the wrong paper size or printing in the wrong color due to using settings that do not match the paper type.
If the paper size and type displayed differ from the loaded paper, select the item you want to change. If the settings match the loaded paper, close the screen.
To select an item, use the 
buttons, and then press the OK button.
If you do not want to display the paper settings screen automatically when you load paper, select the menus on the home screen as described below.
Settings > Printer Settings > Paper Source Setting > Paper Setup Auto Display > Off