The correct way to attach a guidon inside a frame is to make sure it is sewn to an acid-free mat. Other methods will damage the guidon, or they will not provide adequate assurance the guidon will not fall or sag. By correctly sewing the guidon in place, the method provides assurance against damaging the guidon. In Addition, this method will not allow the guidon to slip, sag, or fall from its position inside the frame.