Every program window consists of several parts that allow you to manipulate the window, as shown in Figure 6-1:
Close button (red)
Minimize button (yellow)
Zoom button (green)
Toolbar toggle (appears only on windows that display icons underneath the title bar)
Scrollbars and arrows
Figure 6-1. The parts used for manipulating a window
Closing a Window
Every time you open a window, you'll eventually need to close it again. You can close a window by clicking in the window you want to close and then selecting File ▸ Close or pressing -W.
Another way to close a window is to click the close button of that window. To see ...