Large mirrors reflect a lot of light and make a room feel bigger and more welcoming. And when you put a mirror in an elegant, wide frame like the one shown here, it brings a formal look to any setting. At first glance, the frame has a simple, traditional look — a wide, beveled face, bead molding, and mitered joints. But a second look makes you wonder how it’s done. The key is to take each step in order. This gives you a square reference edge for the subsequent operations. A few easy…