App for sending part of a display to a second monitor?

[immanence]

I'm looking for a way to send part of my screen only to a second display.

Technically, it is only part of a web application. A module that I want - ideally - to magnify and have permanently displayed on a second display.

I looked into Stack, as a container for various web applications. Unfortunately I cannot hone in on the section / module of the web application I need to send to a second display.

Think of screen sharing. You can put a box on what you want to share. Something similar, on a second display.

Even a magnifying function might work, if you can marqee the part you want to magnify, and if it can run constantly.

 

[Nygaard]

Depending on precisely what you need, OBS Studio may work. With a "Display Capture" source, you define the display and region you want to capture, then right click on the main window, go to "Fullscreen Projector (preview)", and select your secondary display.