This instructional video demonstrates the proper technique for 'undoing' or TINKing your purl stitches so that you don't lose them and so that they sit properly on your left hand needle once you take them out.
by Origami How To
by TyingItAllTogether
by demonicrubberducky
by Kidspot
by Macrame Art
by Paracord guild
by MsCaramelhoney79