49 years old and I never learned how to miter simple 45 degree corners.
I tried--BOY have I tried over the years--but if they ever came out half-way right, it was pure luck.
Let's say I have a 12 by 18 opening, and I want to frame it with trim. What size do I cut the lengths to, and how do I use the "box?"
I know this may be a tough lesson to give in a post, but man, it's about time I learned the correct way to do this. We didn't do much mitering while I was growing up in Brooklyn.