The scroll bar appears at the right side or the bottom of a window when all of the information in that window cannot be seen at the same time. You can use the scroll bar to see the hidden information.
The scroll bar of a window allows you to move easily through a document. It comes in handy, especially if you're viewing a long document.
Using the scroll bar to move through a window is called scrolling.
Each scroll bar has two parts: scroll arrows and a scroll box.
Scroll arrows appear at the bottom and top of a vertical scroll bar and at the left and right of a horizontal scroll bar. You can click these arrows to move through a window.
The scroll box is the box inside the scroll bar. It changes size depending on how much information is hidden in the window. The more information there is, the smaller the scroll box is. The less information there is, the larger the scroll box is.
The single scroll arrows let you move up or down one line at a time. Some windows have double scroll arrows that allow you to move up or down one page at a time.
Sometimes your desktop may get crowded, and you may want to move a window or change its size. Sizing a window is different from minimizing, restoring, or maximizing.
Important: You cannot size a window if it is maximized.
Make sure the mouse pointer changes into a two-headed arrow before you try to size the window.
Sometimes a window may be in front of an item you want to click on or view on your desktop.