Using a laptop as a monitor for another computer allows you to not only mirror your computer's screen on the laptop but also extend it, meaning you can show different content on both screens.

The 14-inch display is an excellent accessory for anyone who travels with their laptop, effectively doubling your screen real ...

After a moment, your display device will either mirror your PC or act as an extended monitor. Selecting Change projection mode in the Windows 10 Connect menu lets you choose between mirroring, ...

You can choose to show a single window or app, or, my favorite, finally use your TV as an extended display, like a monitor that's docked next to your laptop. How to share a single app or window on Mac ...