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<p class='vspace'></p><h4>Keyboard Modifiers</h4>
<p>The Keyboard.write() and Keyboard.press() and Keyboard.release() commands don’t work with every possible ASCII character, only those that correspond to a key on the keyboard. For example, backspace works, but many of the other non-printable characters produce unpredictable results. For capital letters (and other keys), what’s sent is shift plus the character (i.e. the equivalent of pressing both of those keys on the keyboard). 
</p>
<p class='vspace'></p><p>A modifier key is a special key on a computer keyboard that modifies the normal action of another key when the two are pressed in combination. 
</p>
<p class='vspace'></p><p>For more on ASCII values and the characters or functions they represent, see <a class='urllink' href='http://www.asciitable.com' rel='nofollow'>asciitable.com</a>
</p>
<p class='vspace'></p><p>For multiple key presses use <a class='wikilink' href='KeyboardPress.html'>Keyboard.press</a>() 
</p>
<p class='vspace'></p><p>The Leonardo's definitions for modifier keys are listed below:
</p>	 
<table  width='500'><tr><td  valign='top'> <strong>Key</strong>	 
</td><td  valign='top'> <strong>Hexadecimal value</strong>	 
</td><td  valign='top'> <strong>Decimal value</strong>	 
</td></tr><tr><td  valign='top'> KEY_LEFT_CTRL
</td><td  valign='top'> 0x80
</td><td  valign='top'> 128	
</td></tr><tr><td  valign='top'> KEY_LEFT_SHIFT 
</td><td  valign='top'> 0x81
</td><td  valign='top'> 129	
</td></tr><tr><td  valign='top'> KEY_LEFT_ALT 
</td><td  valign='top'> 0x82
</td><td  valign='top'> 130	
</td></tr><tr><td  valign='top'> KEY_LEFT_GUI 
</td><td  valign='top'> 0x83
</td><td  valign='top'> 131	
</td></tr><tr><td  valign='top'> KEY_RIGHT_CTRL 
</td><td  valign='top'> 0x84
</td><td  valign='top'> 132	
</td></tr><tr><td  valign='top'> KEY_RIGHT_SHIFT 
</td><td  valign='top'> 0x85
</td><td  valign='top'> 133	
</td></tr><tr><td  valign='top'> KEY_RIGHT_ALT 
</td><td  valign='top'> 0x86
</td><td  valign='top'> 134	
</td></tr><tr><td  valign='top'> KEY_RIGHT_GUI 
</td><td  valign='top'> 0x87
</td><td  valign='top'> 135	
</td></tr><tr><td  valign='top'> KEY_UP_ARROW 
</td><td  valign='top'> 0xDA
</td><td  valign='top'> 218	
</td></tr><tr><td  valign='top'> KEY_DOWN_ARROW 
</td><td  valign='top'> 0xD9
</td><td  valign='top'> 217	
</td></tr><tr><td  valign='top'> KEY_LEFT_ARROW 
</td><td  valign='top'> 0xD8
</td><td  valign='top'> 216	
</td></tr><tr><td  valign='top'> KEY_RIGHT_ARROW 
</td><td  valign='top'> 0xD7
</td><td  valign='top'> 215	
</td></tr><tr><td  valign='top'> KEY_BACKSPACE 
</td><td  valign='top'> 0xB2
</td><td  valign='top'> 178	
</td></tr><tr><td  valign='top'> KEY_TAB 
</td><td  valign='top'> 0xB3
</td><td  valign='top'> 179	
</td></tr><tr><td  valign='top'> KEY_RETURN 
</td><td  valign='top'> 0xB0
</td><td  valign='top'> 176	
</td></tr><tr><td  valign='top'> KEY_ESC 
</td><td  valign='top'> 0xB1
</td><td  valign='top'> 177	
</td></tr><tr><td  valign='top'> KEY_INSERT 
</td><td  valign='top'> 0xD1
</td><td  valign='top'> 209	
</td></tr><tr><td  valign='top'> KEY_DELETE 
</td><td  valign='top'> 0xD4
</td><td  valign='top'> 212	
</td></tr><tr><td  valign='top'> KEY_PAGE_UP 
</td><td  valign='top'> 0xD3
</td><td  valign='top'> 211	
</td></tr><tr><td  valign='top'> KEY_PAGE_DOWN 
</td><td  valign='top'> 0xD6
</td><td  valign='top'> 214	
</td></tr><tr><td  valign='top'> KEY_HOME 
</td><td  valign='top'> 0xD2
</td><td  valign='top'> 210	
</td></tr><tr><td  valign='top'> KEY_END 
</td><td  valign='top'> 0xD5
</td><td  valign='top'> 213	
</td></tr><tr><td  valign='top'> KEY_CAPS_LOCK 
</td><td  valign='top'> 0xC1
</td><td  valign='top'> 193	
</td></tr><tr><td  valign='top'> KEY_F1 
</td><td  valign='top'> 0xC2
</td><td  valign='top'> 194	
</td></tr><tr><td  valign='top'> KEY_F2 
</td><td  valign='top'> 0xC3
</td><td  valign='top'> 195	
</td></tr><tr><td  valign='top'> KEY_F3 
</td><td  valign='top'> 0xC4
</td><td  valign='top'> 196	
</td></tr><tr><td  valign='top'> KEY_F4 
</td><td  valign='top'> 0xC5
</td><td  valign='top'> 197	
</td></tr><tr><td  valign='top'> KEY_F5 
</td><td  valign='top'> 0xC6
</td><td  valign='top'> 198	
</td></tr><tr><td  valign='top'> KEY_F6 
</td><td  valign='top'> 0xC7
</td><td  valign='top'> 199	
</td></tr><tr><td  valign='top'> KEY_F7 
</td><td  valign='top'> 0xC8
</td><td  valign='top'> 200	
</td></tr><tr><td  valign='top'> KEY_F8 
</td><td  valign='top'> 0xC9
</td><td  valign='top'> 201	
</td></tr><tr><td  valign='top'> KEY_F9 
</td><td  valign='top'> 0xCA
</td><td  valign='top'> 202	
</td></tr><tr><td  valign='top'> KEY_F10 
</td><td  valign='top'> 0xCB
</td><td  valign='top'> 203	
</td></tr><tr><td  valign='top'> KEY_F11 
</td><td  valign='top'> 0xCC
</td><td  valign='top'> 204	
</td></tr><tr><td  valign='top'> KEY_F12 
</td><td  valign='top'> 0xCD
</td><td  valign='top'> 205	
</td></tr></table>	 
<p class='vspace'></p><h4>See Also</h4>
<ul><li><a class='wikilink' href='KeyboardBegin.html'>Keyboard.begin</a>()
</li><li><a class='wikilink' href='KeyboardEnd.html'>Keyboard.end</a>()
</li><li><a class='wikilink' href='KeyboardPress.html'>Keyboard.press</a>()
</li><li><a class='wikilink' href='KeyboardRelease.html'>Keyboard.release</a>()
</li><li><a class='wikilink' href='KeyboardReleaseAll.html'>Keyboard.releaseAll</a>()
</li></ul><p><br /><a class='wikilink' href='index.html'>Reference Home</a>
</p>
<p class='vspace'></p><p><em>Corrections, suggestions, and new documentation should be posted to the <a class='urllink' href='http://arduino.cc/forum/index.php/board,23.0.html' rel='nofollow'>Forum</a>.</em>
</p>
<p class='vspace'></p><p>The text of the Arduino reference is licensed under a
<a class='urllink' href='http://creativecommons.org/licenses/by-sa/3.0/' rel='nofollow'>Creative Commons Attribution-ShareAlike 3.0 License</a>.  Code samples in the reference are released into the public domain.
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