Arrange the apps in LaunchPad alphabetically

FWIW, the command resets Launchpad to its default state, not alphabetically. I don't know that there is such a command.

Hello Soren, that's not working under macos Catalina. Any update to this, or it just doesn't work anymore?

Hi ProgrammingProgrammer,

In the finder, hold down command space bar to bring up a search window and type Terminal and double click to open it.

Next, paste the following command in terminal and press enter:

defaults write com.apple.dock ResetLaunchPad -bool true; killall Dock

I hope this helps.