How to use. I haven't used my serger in a few years. I couldn't find the manual or the video, and

Question

I haven't used my serger in a few years. I couldn't find the manual or the video, and have no idea how to thread it, or how many threads to use for each type of use. I want to have a basic overlock on some cotton fabric. I don't need it too heavy, just want to keep it from fraying.