Make 1 Purl Stitch Right (m1pR)

The m1pR, or make 1 purl stitch right, is a right-leaning single increase (when viewed from the knit side of the fabric) that creates a new stitch from the space between two existing stitches.

To work it, use the left-hand needle to pick up the bar between the most recent stitch on the right-hand needle and the next stitch on the left-hand needle from back to front. Purl this new stitch through the front loop (like a normal purl stitch).

This article includes diagrams, and the following video demonstrates how to work a m1pR around the 1:12 mark:

This video will shows you the steps of knitting the purl row equivalent of the Make One (M1) increase technique. Increases are vital to know in knitting if you want to make any shape that is not just a rectangle, and the M1P allows you to adds 1 stitch to your needles part-way through your work.