I do this all the time in Zoom, to share PowerPoint presentations at the correct scale and without exposing my speaker notes, and to share YouTube videos from Firefox without showing the "chrome" portion surrounding the video.
My side monitors are oriented vertically, so if I put those windows in fullscreen and try to share the whole monitor it doesn't come out correctly proportioned. This also provides a smoother experience without the "flicker" of going fullscreen and back (which can happen when you switch focus between windows).
It's a similar use-case to the one bentcorner described above.
The "share region" solution is admittedly a bit of a hack but it works. Love to find an easier solution to this scenario (especially a way to break out speaker notes into a floating window I could position right under my webcam).
BTW apropos to nothing, I always loved the way the old Spy++ tool let you drag a reticle onto a control hWnd (reminiscent of how "Select an Element" works in Chrome DevTools) - that was a neat mechanism to quickly select a perfectly carved out region of an app without having to draw a box, but alas these days with so many going Electron, and other non-standard presentation surfaces, it wouldn't be as useful anymore.
My side monitors are oriented vertically, so if I put those windows in fullscreen and try to share the whole monitor it doesn't come out correctly proportioned. This also provides a smoother experience without the "flicker" of going fullscreen and back (which can happen when you switch focus between windows).
It's a similar use-case to the one bentcorner described above.
The "share region" solution is admittedly a bit of a hack but it works. Love to find an easier solution to this scenario (especially a way to break out speaker notes into a floating window I could position right under my webcam).
BTW apropos to nothing, I always loved the way the old Spy++ tool let you drag a reticle onto a control hWnd (reminiscent of how "Select an Element" works in Chrome DevTools) - that was a neat mechanism to quickly select a perfectly carved out region of an app without having to draw a box, but alas these days with so many going Electron, and other non-standard presentation surfaces, it wouldn't be as useful anymore.