I think it is just simply an Icon from what you've described, I'd say the answer is an Icon. Hope this has helped.
formatting
A __________ mark is sometimes called a nonprinting character because it can be displayed on the screen but is not visible on a printed document.
minimizing
A blank workbook called Book1.xls with 3 worksheets and opened on Sheet1.
Text is displayed at the bottom of every page of a document.
while running the program then the result displayed on the sceen.
application-centric approach
the title bar
The Finder is the default program on a Mac that allows the user to interact with the system using icons for the files, folders and discs that are displayed on the desktop,
A __________ mark is sometimes called a nonprinting character because it can be displayed on the screen but is not visible on a printed document.
Making an extra copy of a document or a program is a common practice. If the only copy is a simple piece of paper, a copy machine will make "duplicates" A more extensive copy is a process called a "back up". This will insure that a duplicate is available if required.
It is called multi-tasking or multiple use.