A: First, fold the cuffs neatly over, making sure the buttonholes on both sides are aligned and one buttonhole is on top of the other. Next, pass the cufflink through the buttonhole on one side of the shirt and out the buttonhole on the other side. Then, secure it according to the type of cufflink. If it is a bullet cufflink or whaletail cufflink, rotate or flip the back end to lock it; if it is a chain, ball or lock cufflink, make sure it is fastened and adjusted to a comfortable position. Finally, make sure the cuff edges are neat after the cufflink is secured.