"page up" is a key on the keyboard, which is used to turn pages up. In a text editing environment, pressing this keyboard can turn the document forward by one page. If you have reached the top of the document, this key will not work.
"page down": it is a keyboard key, commonly known as the down key, which is the opposite of page up. The original intention is to move down. The function is to page down; In a text editing environment, pressing this keyboard can turn the document back one page. If you have reached the bottom of the document, this key will not work.
Extended data
Page is interpreted as "page" in English, but in excel and Word, it is a screen, that is to say, the content displayed on the computer screen is page up on the previous screen and page down on the next screen.
Page Up and Page Down can quickly switch worksheets in excel:
Randomly select a worksheet, use ctrl+page up on the keyboard to turn pages up, and use ctrl+page down on the keyboard to turn pages down.
At present, Microsoft has obtained the patents of "Previous Page" and "Next Page" buttons. The software giant applied in 2005 and was officially approved on August 19, 2008.
American patent. No.7,465,438+05,666 is described as "a method and system for a document viewer to accurately scroll a document, such as scrolling a page, regardless of whether the document is enlarged or not and whether the viewer browses all or part of the page, and can directly switch to the next page." The "inventors" listed in the patent include Timothy Cyrus, Heather Grantham and Joshua Desch.
References:
Baidu Encyclopedia-Page Down