You think maybe the purl on RS is in effect for a decorative ridge?
Another reason I am confused about this instruction to "Purl on RS" is because the step-by-step text instructions for the row say simply to "Knit", but the diagram instructions for the very same row indicate to "Purl on RS, Knit on WS". I don't know how to follow the instructions that seem to me to say to do two different things for the row. I am on the RS starting this row. Do I knit, or do I purl?
Thank you for your help.