Hi Steve, I was having the exact same issue. This was never a problem with any of the previous versions of PSE I owned. I've only experienced this hiccup with PSE 2024. Setting the feather to zero and resetting the tool didn't help in my instance. But I did find something that seems to have fixed the annoyance. In the menu, go to Edit > Preferences > Performance, then uncheck Use Graphics Processor for improved performance. Hopefully this will resolve your polygonal lasso tool problem. Best - Elio
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