You can share the screen of your Mac computer with another Mac using the built-in Screen Sharing feature. Here's how to do it.

Universal Control is coming in macOS Monterey, but you can use any device as a second monitor right now with the right software or accessories.

If you need to expand your screen real estate, and you don't have a second monitor, you can use another Windows 10 computer, and here's how.

It's possible to copy your screen on a Windows computer in two main ways. Here's what you need to know to do it.