I apologize if this has already been answered somewhere.
I made a simple scarf now I am trying to move on up with a dishcloth. It calls for knitting and then purling, but I don't know how to switch from one to the other on the same row without it getting messed up (since it needs to be in the back for knitting and in the front for purling)
It's really easy. Before you purl your stitch, just move the yarn between the two needles from the back to the front. And when you've finished purling and are ready to knit again, do the same thing only from front to back this time.