A windrow system of a combine includes a chopper and a spreader. The chopper includes a chopper housing having a roof and a rotor assembly positioned in the chopper housing, and the spreader is pivotably coupled to the chopper and includes a top surface and an impellor that is positioned below the top surface and includes one or more blades for rotatably conveying crop residue rearwardly and outwardly from the spreader. The windrow system also includes top segment coupled to a main body of the combine, a first curtain, and a second curtain having a portion thereof positioned outwardly of the first curtain. Each of the curtains are movable relative to the main body of the combine when the spreader and/or chopper move between at least one of wide and narrow positions, chopping and windrowing positions, and chopping and stowed positions.