The keyboard symbol for the Shift key (which is called Level 2 Select key in the international standard series ISO/IEC 9995) is given in ISO/IEC 9995-7 as symbol 1, and in ISO 7000 “Graphical symbols for use on equipment” as a directional variant of the symbol ISO-7000-251. In Unicode 6.1, the character approximating this symbol best is U+21E7 upwards white arrow (⇧).3 This symbol is commonly used to denote the Shift key on modern keyboards (especially on non-US layouts and on the Apple Keyboard), sometimes in combination with the word "Shift" or its translation in the local language. This symbol also is used in texts to denote the Shift key.
On computer keyboards, as opposed to typewriter keyboards, the ⇧ Shift key can have many more uses:
On some keyboards, if both Shift keys are held down simultaneously only some letters can be typed. For example, on the Dell keyboard Model RT7D20 only 16 letters can be typed. This phenomenon is known as "masking" and is a fundamental limitation of the way the keyboard electronics are designed.4
The following is a list of actions involving the Shift key for the Microsoft Windows operating system.
Rehr, Darryl, Remington No. 2, 1878, archived from the original on 2009-10-26 https://web.archive.org/web/20091026164821/http://home.earthlink.net/~dcrehr/rem2.html ↩
"Remington Standard 2". Archived from the original on 2021-02-13. Retrieved 2021-08-08. https://www.typewritermuseum.org/collection/index.php3?machine=rem2&cat=ku ↩
"Unicode Character 'UPWARDS WHITE ARROW' (U+21E7)". www.fileformat.info. https://www.fileformat.info/info/unicode/char/21e7/index.htm ↩
"Keyboard Matrix Help". www.dribin.org. Archived from the original on 2 January 2018. Retrieved 1 May 2018. http://www.dribin.org/dave/keyboard/html/ ↩