Windows can use multiple displays in several ways, extending or duplicating your primary monitor. You can even turn off your primary monitor. Here’s how to change secondary display settings with a simple keyboard shortcut.

Using the Windows + P “Project” Menu

To quickly change how Windows 10 handles multiple displays, press Windows + P.

A dark-gray menu titled “Project” will pop up on the right part of your screen. (That’s “project” as in projector, not “project” as in a task people work on together.)

From here, you can use the mouse or cursor keys and Enter to choose the option you’d like. Here’s what the options do:

• PC screen only: This mode only shows video on the primary display, even if a second one is connected.
• Duplicate: This mode duplicates the video output from the primary display onto a second display, which can be ideal for presentations.
• Extend: This mode extends the desktop across as many displays as you have connected. It stitches them all into one large virtual desktop, and you can move windows between them.
• Second screen only: This mode only shows video on the second display, while the primary display remains blank and unused.