Apple enables Universal Control with new iPadOS 15.4 and macOS Monterey 12.3 betas

Apple has released the first set of iPadOS 15.4 and macOS Monterey 12.3 betas, enabling the long-awaited Universal Control feature that allows users to work with a single mouse and keyboard and move between Mac and iPad.
Originally scheduled to arrive before the end of the year last year, Apple announced in December that Universal Control would be delayed until spring 2022, keeping the highly-anticipated new iPadOS and macOS tool in internal development until today, where registered developer beta testers can access Universal Control before its public debut expected around April.
Apple first previewed Universal Control at WWDC last June, describing the feature as a way for users to “work more seamlessly across their Mac and iPad.”
Universal Control lets users work with a single mouse and keyboard and move between Mac and iPad for a seamless experience, with no setup required. Users can even drag and drop content back and forth between devices — great for sketching a drawing with Apple Pencil on iPad and placing it into a Keynote slide on the Mac.