Using a monitor to extend your laptop's display, or to give you a bigger screen for work or play can be super useful. Here's how to do it.

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.

Here’s how to split your screen on either a Mac or Windows computer, a great tool for multitasking. Splitting your screen is a great tool for multitasking. (Photo by Phil Barker/Future ...