Normally, if you wanted a line around the upper chest you would place the line where you want it, then…

…run the tail through the bight to create a Lark’s Head…

…then lock if off with a Half Hitch

The problem with this is that you need to fully release the tail in order to untie this wrap, and if I go on to use this tail to create the rest of my tie, I would have to untie all of that to release this tail.

Run the line around the body where you want it to be, but this time, don’t run the tail through the bight. Instead…

Form a secondary bight with the tail.

Run the primary bight up through that secondary bight so that ~3 inches (~8cm) Goes through. Note that the primary bight should be moving in the upward direction.

Hold that in place, while you run the bight end behind the wrap…

(… you may then have to adjust things so you have a little room…)

…then run the bight back up around the lines of the Secondary bight, forming a Half Hitch that holds the secondary bight in place.

This knot is called a Sheet Bend.

To tighten the wrap and the knot, first pull slack out of the wrap by pulling on the secondary bight, then…

…pull the tail through the Half Hitch…

…to capture and remove that slack.

Now you have a first wrap that can be released just by untying that Half Hitch. You will see how useful this is in “Using the quick-release feature”, below.

Now you can take this tail and either (1) add a second wrap, (2) add a second framing line, or (3) begin adding your imbricated pattern … all of which I show below.