Canon imagePROGRAF iPF680 User Manual page 606

Ink Level Detection
8
Press ▲ or ▼ to select Yes, and then press the OK button.
9
A confirmation message about updating ink information is shown on the
Display Screen. After checking the message, press the ▶ button.
10
Press ▲ or ▼ to select Yes, and then press the OK button.
Ink level detection is now released.
606
iPF680
User's Guide