It is a quick, and easy method to permanently or temporarily, shorten any cord
and best of all... it does not required anything other than the cord itself; no metal twist ties or plastic zip ties!
The cord is shortened by using a series of slip knots (also known as a crochet chain stitch). The stiffness of the cord holds the slip knots in place but a locking tuck at the end will ensure the knots will not come undone.
But, if the shortening is temporary...skip the locking tuck, and a tug on the cord unravels the knots for use of the full cord length in an instant.
Use it to manage charging cords...it will extend in a second to use the device while still plugged in.
Step 1: Spagetti
Most of the time the devices used with a lap top are only a couple of inches away and all the extra cable spills around (or off) the table.
With this solution, a 5 foot cable can be shortened to about 1foot (using 1" dia. loops)
(And don't worry the pesky electrons don't seem to mind the twisted path. They still manage to find their way back and forth.)