Whenever you run an application or open a file or document on your computer, it will appear inside a window on your desktop.
All windows have some features in common.
The horizontal bar across the top of the window, this will bear the name of the file , folder, document, or application in the window. Directly below the Title Bar, these contain menus specific to the program. Clicking on it converts the window to an icon on the Start Bar. Moving to the right in the upper righthand corner of the Title Bar, this button has a single box in it. Clicking on the button enlarges the window so that it fills the entire screen.