This is meant to be a very basic overview of how I sew a loop into the end of a line. I intend to keep it a broad as possible - it is quite simple, however, I personally would have liked to have found a simple instructional guide to it when I taught myself - so hopefully this is that for some people.
I use Bonded Nylon thread, however I know some people believe that other threads like Dacron are better for this use.
Step 1: Make the guide plate
Step 2: Tape it down
Step 3: Start sewing
To begin sewing a loop position everything carefully, and make a couple back and fourth stitches turning the machine manually to make sure everything is going where you want it. You will want the angle of the zig-zag to create somewhere between a 45 and 90 degree angle with itself. See picture
Use a sharp needle - the sharper the needle, the less likely it is to catch fibers and damage them on its way through the line