Abstract: A window assembly and related method for dropdown feed doors and the like includes a rigid marginal frame configured for close reception in an associated opening in the feed door. A mullion has opposite ends connected with top and bottom portions of the frame. A latch arm is supported by the mullion, projects upwardly from the top portion of the frame, and is shifted between a locked position to retain the feed door in a raised, closed position, and an unlocked position to rotate the feed door to a lowered, open position. A latch actuator is mounted on the mullion at a selected position vertically spaced apart from the latch arm, and includes a slide which shifts between latched and unlatched positions.