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In cases when the document is shorter than the full screen, Page Up and Page Down often have no visible effect at all. Operating systems differ as to whether the keys (pressed without modifier) simply move the view – e.g. in Mac OS X – or also the input caret – e.g. in Microsoft Windows.
The Scroll Lock key is meant to lock all scrolling techniques and is a vestige of the original IBM PC keyboard. In its original design, Scroll Lock was intended to modify the behavior of the arrow keys. When the Scroll Lock mode is on, the arrow keys scroll the contents of a text window instead of moving the cursor.
Ctrl+Alt+Print Screen: Save screenshot of window as file ⇧ Shift+⌘ Cmd+4 then Space then move mouse and click: Alt+Print Screen : Ctrl+Alt+Show Windows then move mouse and click Copy screenshot of window to clipboard Ctrl+⇧ Shift+⌘ Cmd+4 then Space then move mouse and click: Alt+Print Screen : Ctrl+Alt+Show Windows then move mouse and click
Here are some Windows key commands and what they do: Windows key (Win): opens the Start menu on your computer. Windows button + Tab: switch your view from one open window to the next.
Scrolling Lock – Scroll Lock. In some applications, such as spreadsheets, the lock mode is used to change the behavior of the cursor keys to scroll the document instead of the cursor. Usually located to the right of the function keys. Some laptops and compact keyboards also have a Function Lock - FN Lock.
Basic Window commands These basic PC keyboard shortcuts will work on all applications, browsers, and programs, as well as Windows 10 and earlier versions including Windows 8.
In modern software, typing text usually causes previous text to scroll off the top of the screen or window. Some old programs could disable this and restart at the top of the window when scroll lock was pressed. The advantage is that the entire screenful of text does not shift, making it easier to read.
The arrow buttons on the keyboard may be clicked to scroll up, down, left, or right on a page. This scrolling technique usually results in the screen scrolling very slowly in comparison to the other scrolling techniques. Clicking the arrow buttons would result in the page continuing to scroll until one of the scroll limits has been reached.