What is the Pg Dn Key (Page Down Key)
The Pg Dn key is a computer keyboard key located on the numeric pad number 3 or between the keyboard and the numeric keypad. It can also be referred to as the Page Down key, the PGDN key, PD, or the PgDn key. The Page Down key can be configured to do anything, but it is generally used to scroll text down one screenful. You may highlight the next Page in a text document by pressing and holding the Shift key while pressing the Page Down key.
The page view is shifted (scrolling) down one Page when this key is pushed if the Page being viewed has more than one Page. On every website page (including this one), press the Pg Dn key; for example, scroll the Page down one Page, but when you are at the bottom of the Page, using the Down button has no effect.
The Page Down key is typically used to scroll down in documents, but the amount of space that may be moved varies depending on the application. In word processors, for example, they may skip by a simulated physical page or by a screen view that, depending on the zoom factor, may only display a small bit of one Page or many pages at once. When a document is too short of filling the entire screen, Page Down frequently has no real effect.
The image below shows the Page Dn key on a computer keyboard, including the numeric keypad and the primary keyboard.
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Turn off the Num Lock so that pressing the number three on the keypad will act as a page-down key rather than the number 3.
Note: The Apple computer keyboard’s numerical keypad lacks a Page Down key. Both the Num Lock key and the option to make the 3 key a page Down key is absent from Apple computer keyboards.
Depending on the operating system, the keys (pushed without a modifier) may move the display only, as in Mac OS X, or they may also move the input caret as in Microsoft Windows. PgDn will change direction to the left or down in right-to-left configurations (instead of right).