Windows have Sizing Buttons.
The red X means exit.
Click the X to close the Window.
The middle
square is the Resize button.
Click once-the Window enlarges to fill
the whole screen. Click it again and the Window reduces to the size
you started with.
The – line means Minimize.
The Window parks on the
Status bar by the Start button and waits patiently for you to
return. The program isn’t turned off- it is idling.