Hi Katie,

Shift Paths component will shift the indices of the paths one back. It's the oposite of doing a Graft operation.

Below is an image that explains it a bit better, I have a grid with 6 branches and in each branch 6 points.

Then I graft them, so each point now has its own branch and then I shift the paths one back so we arrive at the initial 6 branches containing 6 points, each.

If this still sounds like hocus pocus, don't worry trees and branches are hard to grasp at first. I'd adivse you to watch the Grasshopper 102 here:

https://thinkparametric.com/courses/grasshopper-102-data-lists-and-tree-structures

Best,

Arie