Jason Snell, [waxing excited][1] about what Spotlight can do in Tahoe:
The new Spotlight also has integrated one of the most useful and unheralded features of macOS: the ability to search the menus of the app you’re currently using. You’ve been able to do this for ages from the Help menu or via the Command-Shift-slash keyboard shortcut, but if your muscle memory always takes you to Spotlight’s Command-space, you can now search all the menu commands in your current app from there, too.