Undo k1b

Hi,

I need to undo a row of k1 k1b. I can tink the knit stitches but don’t know how to undo the k1b. Does anyone know of a video that shows how to do this ? thanks~

I let the k1b drop off the needle and then put it back on the needle as though it’s a repair of a dropped stitch where the stitch below has pulled out, similar to this video for a knit stitch.