How Many Monitors Can You Add? Most computers can run dual monitors. But if you want to add a third screen or use two 4K monitors, check that your device is capable first.

Is there a device, like a switch or something, were I toggle 1 monitor for back and forth 2 computers? It's to seperate towers, 2 different video cards (GeForce Prophet MX II and some crappy 8 meg ...

If you want to use the iPad as an extra monitor with a MacBook or a different computer running macOS, the process is as simple as connecting the two devices.