A modifier key is a key that modifies the action of another key when the two are pressed together. Common modifier keys include Shift, Control, Alt and Function Keys. The Control (Ctrl) and Alt keys are found on Windows keyboards. For Example - The "Shift key", which is found on all keyboards, is used to capitalize letters and enter symbols (such as the ones found above the number keys). The modifier keys rarely performs any function when pressed by itself.
Here are the list of modifiers keys found on windows keyboard:
1. Shift Key - Shift key used for capitalize letters and and enter symbols.
2. Ctrl Key - When pressed in conjunction with another key, performs a special operation (for example, Ctrl + C is a shortcut for performing copy)
3. Alt Key - The Alt key on a computer keyboard is used to change (alternate) the function of other pressed keys. Character other than found on keyboard layout can be typed using alt+ some numeric code.
4. Windows Key - The windows key is also an modifier key used for press some shortcut.
5. Function Keys - These keys act as shortcuts, performing certain functions, like saving files, printing data, or refreshing a page.
- Arrow keys
- Page Up/Page Down
- Carriage return
- Space bar
- Language input
- Scroll Lock
- Num Lock
- Caps Lock
- Function keys
- Print screen
- System request
All these keys are not counted as keystroke for the purpose of typing speed calculation.