Push the back of the sofa all the way forward so the back cushions touch the seat cushions. You will hear a loud click noise, which is the locking mechanism of the sofa releasing.
Pull the back of the sofa down to the level you want. As you pass through the adjustable settings, you will hear the clack noise of the locking mechanism moving. Stop at the setting you want or lay the back all the way down to create a flat day bed or futon bed.
Push the back of the sofa up to the desired position to convert the futon or day bed back into a couch. Listen for the clicking noise as you raise the back up through the different settings. Once you reach the setting you want, release the sofa back.