Did you look at the link I shared above?
By adjusting support cables on the sides of the tailgate, owners can also set the tailgate to a halfway-open position. That acts as sort of a built-in bed extender and allows owners to haul varying sizes and shapes of cargo more easily. For example, owners can load in up to 18 4x8 sheets of three-quarter-inch plywood by laying them across the half-open tailgate and the rear wheel wells.