Which button is used to expand a window on a computer?

Maximizing a window refers to the action of expanding it to fill the entire screen, making it easier to work with multiple applications or documents at once. The maximize button is typically represented by a square symbol in the upper right corner of a window on most operating systems. When you click this button, the window enlarges from its previous size to utilize all available screen space, providing a larger view of the content.

In contrast, while terms like "open," "enlarge," and "expand" might suggest a similar concept, they do not specifically indicate the action of maximizing a window to full-screen size. "Open" generally refers to starting a new file or application, while "expand" or "enlarge" could imply any increase in size without guaranteeing that it would fill the screen. Therefore, the button specifically designated for maximizing a window is the most accurate choice.