There are times when you would like to add an interesting edge to some knitting. Often this is a lace edge to a shawl or garment. The edging is usually worked at right angles to the main body and attached as you go. As you are working at right angles, this is sometimes referred to as working sideways. There are many different variations dealing with how to attach the sideways edging, here I describe the one I use when I want to hide the seam.
I use this technique in the Dino Boom! hat. If you prefer, you can watch this video, where I walk through attaching the sideways edging to create the hat’s garter stitch brim.