Pressing the + or - button when the printer is in the Ready state, takes it offline and the LCD will show the control panel menu.

Press to scroll through the menus and options. Press the button until you see the setting you want.

You can enter numbers in two ways. You can press the + or - button to move up or down one number at a time, or you can hold down the + or - button to move faster. When you see the number you want, press OK.