The "_" button works for me (i.e. the middle of the three breakout, minimize, close buttons). I expected it to minimize the window to a taskbar, like in Windows

The "_" button works for me (i.e. the middle of the three breakout, minimize, close buttons). I expected it to minimize the window to a taskbar, like in Windows, but it restores it to the original size instead. I found this unintuitive but don't know a better icon.