The techie definition of "focus" is that the window of a particular application is on top. What do you mean by changing the focus but not the window that is on top??
The techie definition of "focus" is that the window of a particular application is on top. What do you mean by changing the focus but not the window that is on top??
Actually the proper definition in terms of applications and programming for focus is "the GUI component that is the target of user input". There are plenty of examples of windows being on top that are not in focus. The 1st off the top of my head is task manager in Windows. It's always on top, but other windows can be the focus of user input.
To answer the OP, there is an app for Mac called Afloat that seems to be what you're looking for.