The split stitch is typically used as an outline stitch.
1 At one end of the line where the split stitch will occur, make a single, straight stitch.
2 For the next stitch, put the needle halfway through the previous stitch, splitting the thread.
3 Stick the needle a little further down the line.
4 Pull the thread all the way through and taut.
5 Repeat steps 2-4 until the line is complete.
Tips: (i) The stitches for this tutorial were done at roughly 1/8 of an inch. You can go shorter or longer if you like. (ii) Working from top to bottom or bottom to top can help achieve an even look. If your line is horizontal, simply move your hoop until the line becomes vertical.