But if you’ve ever been stumped by the buttons on your air fryer, you’re not alone. I also pinged Lab Director Nicole Papantoniou to decode the most commonly used buttons on the air fryer. “The buttons help make clear what you can use your air fryer for and make it easier to program,” she says. She’s tested dozens of air fryers and air fryer toaster ovens, including the most recent models in the Lab. She’s a firm believer that leftovers, frozen pizza, and homemade croutons should always be made in an air fryer.