Dead Sea Scroll chiasm

Although chiasmania is easy to catch, I do enjoy trainspotting chiasm--especially in the Bible,but also in  literature like the U2 canon ( "the sick stay healthy, and the sick stay poor')..

But I didn't realize it had been utilized visually in the Dead Sea Scrolls.
Photo of an actual scroll here>
Not sure of the chiasm is just in the visual arrangement , or is literary (as in reverse parallelism of words/themes) as well  out the text (can't make out the text in photo).
Surprisingly, not much online about it except this.