I liked the feature in Linux where you could simply turn a window transparent. I also had an app for Windows that did it, called Peek Through that did it. I finally came back to macOS and now I want a similar feature. I don't know the Swift/C langs, but I know the command line pretty well (kinda rusty, my short stint with windows didn't help any). I have seen the "Deskovery" app but I don't want to pay money for it. I have seen the old app "afloat" but I am pretty sure that doesn't work on newer computers. I am on a MacBook Pro 8,1 running macOS Mojave. Any help is greatly appreciated. Thanks a lot!
Here is a post that uses Swift/Objective-C code to create a semi-transparency thing. https://stackoverflow.com/questions/11174918/how-to-get-window-with-semi-transparent-blurred-background.