Snap application windows to 1080p?(or any specific size)

I'm producing 16:9 educational screencast videos recorded by remote instructors. Some of them have non-16:9 monitors (ultrawides, etc.) MacOS (usually Monterey.)
I was excited to learn about the partial screen recording feature of Screenflow 10, and its ability to use common dimensions (1080p, 720p, etc.)
But, as far as I can tell, the instructors still have to manually resize any windows that they want to fill the recording area. Is there a way to automatically resize application windows to a specific size, such as 1920x1080, or 1920x1080 minus the height of the menu bar?
I found this: https://blog.scottlowe.org/2020/11/08/resizing-windows-to-a-specific-size-on-macos/ and I might give it a shot, but it feels clunky, and could be tricky to deploy across many instructors with varying systems.

Or, is there a better way to do this? I'd like to avoid letterboxes.

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  • In ScreenFlow after selecting Partial Screen Recording then select the window you want to capture and then hit the spacebar and the specific window is selected. Of course, that window doesn't have to be a standard 16:9 size though.


  • If you do need a standard size then once you select partial screen recording you can select the square on the right of the Record button and you'll get preset standard size regions and then you can resize the window to fit.


  • Thanks, Craig! To clarify, I need to resize the application windows, so that when I capture a 1080p picture using Partial Screen Recording, it fills the entire recording area. I found an app called Moom which allows for custom resizing presets, and it works great. I created a custom preset for 1920x1080, and another for 1920x1054 for cases in which I need to record the menu bar, which on my Thunderbolt Display is 26px high.

  • Jesse Gay said:
    I found an app called Moom which allows for custom resizing presets,

     Resizing the application? That sounds useful.

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