The '+' button and double-clicking the title-bar doesn't maximize windows—it zooms them in Apple's terminology. It should just make the window big enough to dis

The '+' button and double-clicking the title-bar doesn't maximize windows—it zooms them in Apple's terminology. It should just make the window big enough to display its contents, although some apps don't cooperate (Chrome). Hammerspoon can be configured to maximize windows, i.e. make them fill the screen.