This is the blog post where I first learned about the technique for removing samples from the loom. I should note that I didn't follow the directions exactly in my own example--you are supposed to weave in two dowels or lease sticks, not just one:
https://peggyosterkamp.com/2020/04/cutting-off-some-of-the-cloth-before-the-warp-is-finished-the-two-stick-heading/