Task: Translation
Input (Spanish): Each corner support is pivotable about its hinge between a use position, generally parallel to the base, and an open position, generally adjacent one of the edge walls.
Output (English): Cada soporte de esquina es pivotable alrededor de su bisagra entre una posicion de uso, en general paralela a la base y una posicion abierta, en general adyacente a una de las paredes del borde.