If you’re at your Mac, go ahead and click a window for another app (don’t forget to come back right away). Clicking an app’s window brings it to the foreground, of course. But did you notice that only the window you clicked came forward. If that other app has any other windows open, they will stay hidden. It wasn’t always this way. In pre-OS X days, the default behavior was to bring all those windows to the front. And now, thanks to a new app called Front and Center, from John Siracusa, you can get this behavior on a modern Mac.