My workflow involves a lot application windows, mostly terminals. With a very large dual screen setup, I find myself regularly looking for the currently active window. More than often I type in the wrong terminal, or even start typing in a browser window, because I thought the active window was somewhere else.
I could not find a way to change window properties such as opacity and border / title bar colour. My title bars are either light grey (active) or very light grey (inactive). I am looking for hints on how to make it visually more prominent where the currently active window is.
(Note: I am not looking for keyboard shortcuts or anything that requires interaction)