Xbox One received a new app today that lets you project your phone, PC, or tablet screen onto your TV.

Choose Extend if you want your laptop to act as a true second monitor that gives you additional screen space for productivity. You should now see your laptop device name as an option for connecting.

In my case, I can then right-click on one of my monitors and select whether I want to clone the display (what appears on the primary appears on the other) or extend the display—the setup you ...

A projector can double as a secondary monitor when you connected it to your PC. This setup enables you to extend or duplicate your computer's display onto a massive canvas, so that you can view ...

When Using Two Monitors With One Computer, How Do You Move Information From One Screen to the Other?. When you connect two monitors to the same computer, you can instantly double your screen real ...

Duet Display lets you use any Android device as a second screen for your Mac, whether wired or wireless, giving you extra space for multitasking.

The folks behind Duet Display have released a Windows client, allowing you to extend your machine to any iOS device.