Is there an action available to keep a window on top of all other ?

Hello,

everything is in the title : Is there a way to keep a window on top of other thanks to a gesture / preset ?

I regularly use my calculator app, and I want it to stay on top when I'm on spreadsheets for example;

unfortunately this is not possible without disabling SIP (System Integrity Protection). Thus BTT does not support it ;-(

I don't know what kind of calculator you need, but there are many calculators with floating windows. For example this one in the App Store

There is also the app Afloat.

But I'm not sure if it works with newer Mac Os.