Thank you, William. Yes, I use the magic marker for the same reason. And I also agree that the Veritas tool rest is not the most stable having moved on me during mid-sharpening. But that was also one of the reasons I wanted to know if I could find a better way of reestablishing the angle if it did move during a sharpening session.
Shop Amazon using this affiliate link, and Amazon will pay WoodCentral a commission on anything you buy. The commission is used in paying the costs of maintaining this site, and the price you pay on Amazon is NOT affected by using this link.