Hard to explain. When it is pulled all the way out, the rear and bottom cushion makes the bed. (This is the position it is in when pulling in the rear bed and closing up the trailer.)
To make is a couch, just push the bottom part in while lifting up the backboard and placing the cushion on the bottom and the back.
There is also a strap you can snap from the back to the bottom to help keep it in the couch position.
It is not a big bed, believe it is made for one short person. I know if I stretch out on it in the couch position, my feet overhang.
Couch position: