In the abbrevations listed on the pattern it says that SCO is a single cast-on. Looking at the pattern instructions it is used to increase by one stitch at the very end of a row.
Thanks! I watched the video and managed to add the stitches where necessary…
one further question… at one point it says to do seed stitch for 4 rows… does that mean I do a total of 4 rows of seed stitch, meaning I would alternate knit/purl for a total of 8 rows? Or do I just do 4 rows - one starting with a knit stitch, the next with a purl stitch, etc.?