It can sometimes be convenient to keep part of a document (title of a table, for example) permanently displayed, while being able to scroll through the rest of it. You can cut (seperate) your Word window into two independent parts, while working on a single document. Procedure:
Put your cursor at the top of the vertical scroll bar to the right until it turns into a double arrow (pointer resizing).
Click and hold and then pull the dash down to the desired location. When you release the mouse button, the window splits into two and a second slider appears to the right (to be able to scroll vertically in the second part).
If the vertical scroll bar is not displayed, click on the File menu and select Options. On the Advanced tab, View, check "Show vertical scroll bar".