help to zoom in on a specific area

Hello, I hope someone can help.

I'm working on a project where I've purchased some Surface Pro 7 devices to allow people to select presets that control some lighting. Does anyone know of an app or another solution where I can zoom in on a specific area of the screen and make that area fill the entire screen? It would also be great if I could lock the Surface so that only a specific area could be tapped.

I hope this makes sense, and I hope someone can help. I've been googling for several days 😊