Moving the focus of your computer screen up, down, left, or right, to see more information than will fit on the screen at one time. Scrolling can be accomplished by using the keyboard arrow keys or the Page Up and Page Down keys. A mouse can also be used to scroll by maneuvering an on-screen scroll bar.
Using the cursor keys to view parts of a document that extends past the bottom or top or sides of the screen.
When there is more information than can fit on a screen at the one time, scrolling moves all the lines of text one position over so that a new line of text can be seen. For example, when you scroll down (using the scroll bar to the right) all the lines of text move up, the top ones disappearing, so that new lines of text are shown at the bottom of the page.