Page 89 - Patrick Moreau-Marine "Knots How to Tie 40 Essential Knots"

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4 - The final adjustment must be handled very carefully.
The best way to do this is to use your right hand to pull on each of the four parts, one at a time, while
keeping the structure in your left hand.
By pushing each pair of the two strands located on either side of the knot, it can be untied fairly easily.