You're welcome. It was a eureka moment for me when I read that tip and tried it. So that I give appropriate credit, the book was Still-Hunting Trophy Whitetails by Bill Vaznis.
When I read it a couple of years ago, I was frustrated that I had not figured it out on my own. Thinking back through the years, when deer had come upon me while I was kneeling or sitting by a tree, they rarely gave me a second look. When I was upright, the deer either spooked or were so wired that no shot was possible.
Since then, when I realize a deer is going to be in range, I nearly dive for the ground. I almost never spook them now. (Assuming I've played the wind correctly.)