Nice diagram for making a sliding knot - AKA: Double Fisherman's Knot
Knitting increases serve a very practical function: to shape the fabric by adding new stitches. But beyond this practical function there is also a decorative element. An increase can either be so subtle as to be almost invisible, or it can be very obvious. Increases also have direction in that they lean either to the right or to the left. Here are a few of the most common types of knitting increases and how to use them!
Jasmine Stitch [Free Crochet Pattern and Video Tutorial]