How to use your iPad as a second monitor for your Windows computer

To use an iPad as a second screen on a Windows 10 computer, you'll need to use a third-party app like SplashTop.
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Yes, You Can Use Your iPad As a Second Monitor Without Sidecar

Sometimes you just need a quick and easy way to connect a second monitor, without dealing with a whole new display. Apple's Sidecar feature lets you turn your iPad into a second display for the Mac, ...
Computerworld

Microsoft’s new Windows App lets you connect to Windows from almost any device

Microsoft’s Windows App is now available for macOS, iOS, iPadOS, and Windows devices, with an Android version in preview. Users can also access remote Windows PCs — either Windows Professional or ...