Pat, not sure which OS you're using (or if it matters), but if you set the item grouping to "None" and display the Column view, when you hover over the "Name" column a small arrowhead appears (see attached). Click on this and the names will toggle between alpha and reverse alpha order. Hope this helps.
Jock
Sorry - just noticed you quoted the OS. I'm on Mojave, but I'm not sure there's a difference. And this pretty much duplicates Linda’s advice. I’ll wake up in an hour or two.