Page 23 - Jane Renolds - Knots Your Complete Step by Step Guide to Knot, Knot Uses, and Knot Tying

Figure 8

The Figure 8 is a convenient and quick form of stopper knot that makes
sure a line doesn’t fall or slide out of sight—even if it comes with tight jams
in the block. It’s also a knot that you can undo on your own, and if not done
right, you’d have to have it retied.

http://www.animatedknots.com/imagesprelim/figure_8_knot.jpg

Instructions:

1. First, let the tail of the rope pass over itself so you could form a
loop.
2. Then, continue the process and let it come through the loop near the

standing end.
3. Make sure to complete the knot by letting the tail pass through the
loop.