This changes the seal level for type of food - moist or dry. Liquids can be drawn up by the vacuum process and liquids between the layers of the bag can have a cooling effect on the heat seal. Adjustable Food Settings Seal Level can extend the seal time to compensate for liquid and create a secure, reliable and air-tight seal.
Hint: When vacuum sealing very moist foods such as stew, try letting the bag hang lower than the unit, by placing it on an open top kitchen drawer. Hit the seal button once you see liquids start to move up the bag. When sealing large volumes of liquid, it is normal to have some air bubbles remain in the bag.