You can use your iPad as a second monitor with a Mac or Windows computer, with a free option available. Here's how you can do it.

Sidecar in macOS turns your iPad into a second display, but it's limited to certain Macs and iPads. Thankfully, a few third-party apps can help if you have an older Apple device or Windows PC.

If you need a second screen for your PC, your laptop can come in clutch. Here's how to set it up on Windows and macOS.

A dual-monitor set-up can help to increase productivity, but what if your second screen isn't being detected? Here's what to try to fix the problem.