Certain workflows require sharing the entire screen (usually due to switching through multiple applications), but if the presenter has a much larger display than the audience it can be hard to see what is happening.

PortalBox is described as 'A macOS screen sharing app that lets you share any region of your screen in Zoom, Google Meet, Teams, and more. Draw a box, get a live preview window, and share only what you want' and is a Remote Desktop tool in the remote work & education category. There are six alternatives to PortalBox for a variety of platforms, including Mac, Web-based, Windows, Linux and Android apps. The best PortalBox alternative is DeskPad, which is both free and Open Source. Other great apps like PortalBox are screego, Mikogo, Zone Share and screensy.
Certain workflows require sharing the entire screen (usually due to switching through multiple applications), but if the presenter has a much larger display than the audience it can be hard to see what is happening.

For developers, screen sharing shouldn’t be optimized for low bandwidth or presenting some slides. It should be high definition, that you still can read the tiny font of your colleague. No more, “wait a minute, the stream isn’t updating”.
Mikogo is a free screen sharing solution that allows you to share any screen content in true color quality with up to 25 participants. Perfect for online meetings and web conferences. An easy-to-use and intuitive tool.



Zone Share - Screen Sharing for Ultrawide Monitors - is the essential screen sharing solution for macOS ultrawide monitor users. Share only part of your screen in Zoom, Teams, Google Meet, and any video conferencing app.




