How to use Universal Control with your Mac and iPad

macOS 12.3 and iPadOS 15.4 have been released and Apple finally added Universal Control, the much-anticipated feature that was revealed at WWDC 2021. Late last year, Apple announced that the release of Universal Control would be delayed to this spring, and now it’s finally here. For the uninitiated, Universal Control allows you to use an iPad as an external display for a Mac. During the demo in the WWDC keynote, Apple VP Craig Federighi merely placed the iPad next to his Mac, an