Originally Posted by
cakey
I wish the "+" button would just maximize the app window.
The Mac doesn't have "fullscreen" mode like Windows, except in situations where it is actually
desirable - such as in presentations, slideshows, or movie viewing.
The green button's function is "resize the window to best fit its contents"; that is, it will zoom a window so that as much as possible will be visible, without wasting huge amounts of screen space with useless expanses of grey.
Get used to working with layers of windows; it helps a lot with the drag-and-drop ethic which is so basic to Mac use.