One simple way to create a new folder is to right-click on an empty space on your Mac's Desktop. Next, select New Folder from the menu that pops up, and you'll see a blue folder added to the icons ...

You've long been able to customize folders in the Mac's Finder, but only with a lot of non-obvious fiddling. Now with macOS ...

Grab and move multiple icons. Also new in iOS 18 is the ability to move multiple icons at once. When in the home screen edit mode with icons jiggling, tap and hold one app icon, then with another ...