A modifier key is a key on a computer’s keyboard that is only used in conjunction with another key. Modifier keys are often used with other keys to perform computer keyboard shortcuts and other commands. For example, in many text editor programs pressing the Ctrl+A will select all text.

Below is the list of Keyboard Modifiers that can be used with the Keyboard.press() function in the Arduino keyboard library.

keyboard
Photo by Karol D from Pexels

Command
Key in Windows
Key in OSX
KEY_LEFT_CTRL
Left CTRL
KEY_LEFT_SHIFT
Left SHIFT
Left SHIFT
KEY_LEFT_ALT
Left ALT
Left OPTION
KEY_LEFT_GUI
Left WIN KEY
Left COMMAND
KEY_RIGHT_CTRL
Right CTRL
KEY_RIGHT_SHIFT
Right SHIFT
Right SHIFT
KEY_RIGHT_ALT
Right ALT
OPTION
KEY_RIGHT_GUI
Right WIN KEY
Right COMMAND
KEY_UP_ARROW
UP ARROW
UP ARROW
KEY_DOWN_ARROW
DOWN ARROW
DOWN ARROW
KEY_LEFT_ARROW
LEFT ARROW
LEFT ARROW
KEY_RIGHT_ARROW
RIGHT ARROW
RIGHT ARROW
KEY_BACKSPACE
BACKSPACE
DELETE
KEY_TAB
TAB
TAB
KEY_RETURN
ENTER
RETURN
KEY_ESC
ESC
ESC
KEY_INSERT
INSERT
KEY_DELETE
DELETE
KEY_PAGE_UP
PAGE_UP
KEY_PAGE_DOWN
PAGE_DOWN
KEY_HOME
HOME
KEY_END
END
KEY_CAPS_LOCK
CAPSLOCK
CAPSLOCK
KEY_F1
F1
F1
KEY_F2
F2
F2
KEY_F3
F3
F3
KEY_F4
F4
F4
KEY_F5
F5
F5
KEY_F6
F6
F6
KEY_F7
F7
F7
KEY_F8
F8
F8
KEY_F9
F9
F9
KEY_F10
F10
F10
KEY_F11
F11
F11
KEY_F12
F12
F12
KEY_F13
SHIFT + F1
FN + F1
KEY_F14
SHIFT + F2
FN + F2
KEY_F15
SHIFT + F3
FN + F3
KEY_F16
SHIFT + F4
FN + F4
KEY_F17
SHIFT + F5
FN + F5
KEY_F18
SHIFT + F6
FN + F6
KEY_F19
SHIFT + F7
FN + F7
KEY_F20
SHIFT + F8
FN + F8
KEY_F21
SHIFT + F9
FN + F9
KEY_F22
SHIFT + F10
FN + F10
KEY_F23
SHIFT + F11
FN + F11
KEY_F24
SHIFT + F12
FN + F12

Example Codes

Program to open a new window. Taken from arduino.cc

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