To use your iPad as a second display for a Windows PC, you can use the spacedesk app by datronicsoft, which is free for personal use.Ensure both your Windows PC and iPad are on the same Wi-Fi network to establish the connection.The spacedesk DRIVER Console on your PC must be ON, and then open the spacedesk app on your iPad to connect the devices.By default, your PC screen is mirrored on the iPad, but you can choose to extend the display using the Windows ⊞ + P keys on your PC.Adjust how your additional displays are arranged on Windows by going to System > Display in Settings and identifying the respective positions.You can interact with the iPad touchscreen using either your finger or an Apple Pencil while using spacedesk, unlike Apple's Sidecar.Access spacedesk settings on your PC to configure client settings for the iPad display.To stop using the iPad as a display for your PC, you can exit the spacedesk app on your iPad or select PC screen only on Windows.If spacedesk is not working, ensure both devices are on the same Wi-Fi network and try restarting them or reinstalling the apps.Alternatively, you can use a wired connection with a USB-C or Lightning cable to connect your iPad to the Windows PC for display mirroring.