incR is the abbreviation used for knitting into the stitch below in a way that makes your increase lean to the right. Then the incRp is a variation where you purl instead of knit. The mirror stitch of this is the incL, the incLp, or the incpLp.
Abbreviations:
incR – increase right
incRp – increase right purl
incpRp – increase purl right purl
How to incR
Use the right needle to pick up the top of the stitch below the first stitch on the left needle. Lift it onto the left needle and knit as a stitch. Count increase.
How to incRp
Use the right needle to pick up the top of the stitch below the first stitch on the left needle. Lift it onto the left needle and purl as a stitch. Count increase.
How to incpRp
Use the right needle to pick up the top of the stitch below the first stitch on the left needle. Lift it onto the left needle, purl it, then purl the original first stitch. Count increase and original stitch.
How to work an inc3
Knit into top of stitch below first stitch on left needle then knit first stitch on left needle (see IncR) and then knit into the top of the stitch in the row below the stitch from the left needle just knitted (see incL). Increases to 3 stitches from 1 stitch
Other ways to work increases include, yarn over, make one, and knit front and back.
