You can add widgets to the [Home] screen to show the remaining amount of toner or change the display language.
Press the [Home] key.
Select the screen to which you want to add a widget.
Press and hold down an area on the screen where no icons are displayed.
Press [Widget] on the [Add to Home] screen.
Select the widget you want to add from the list.
If you cannot add a widget, delete unused widgets that already have installed, and add the widget again.