There are a few things that you need to consider before starting a sketch. It's very important to keep in mind a couple of rules while designing your data. First, you need to have to hold the points, they need to be on the same level. These are the two holding points. It helps keep the bookmark in its place. Second, the letter needs to be bold so the bookmark can hold and not crack when.

So I usually designed my letter inside the rectangle. I made a video for you it will be available as an attachment