A demonstration of the purl front & knit back increase (pf&kb): Purl into the front of the stitch, take the yarn through to the back and then knit into the back loop of the stitch.
by Debby Hunker
by Howcast
by Annai Tailoring
by planetpurl
by ashwini dhone sangamner
by aeeknitting
by VerenaKnitting