Page 553 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"

4. In one hand hold the working end against the other leg of the bight where it crosses the turn around the
object, and pull the standing part of the rope to tighten the knot. Slide the knot along the standing part to
take up or let out slack. Pulling on the working end will instantly release the knot.

Untying: Simply pull the working end and the knot comes apart.

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