to get some answer by typing
The function keys.
By eating cheese.
function keys
i think its depend on the application. function keys are also use as edit keys.
there are 12 basic function keys in a standard keyboard
Keyboard shortcuts are controlled in System Preferences/Keyboard. Apple has preselcted some keys such as F10, F11, and F12 to control volume. These keys can be set to other functions in the System Preferences/Keyboard pref pane. There are many function available. Take care in setting them so that you don't have two keys doing the same function. To use the F keys as function keys and not as the preset keys, press the fn key on the keyboard first, and then press the F# key you need.
The function keys are the top row of keys on the keyboard, normally labelled F1-F12.By themselves they have no function - they are 'blank' spare keys meant for programs that want a place to put various keyboard shortcuts.That is, the function of the function keys is not determined by the keys but by the program using them, and could be anything or nothing.
Press the NUM LOCK, Function, and DELETE keys to go back to alpha keys.
The function keys on the BBC Microcomputer were coloured red.
There are more than five parts of the keyboard. Four parts of the keyboard are the typing keys, the numeric keypad, function keys, and control keys. The last part of the keyboard is the extra keys.
They are function keys. Each software manufacturer can program each application to respond to the function keys in whatever way they choose. Many different developers often use certain function keys for the same thing. For example, F1 almost always opens an application's help file.
The function keys are typically the top row of keys, labled F1 through F12.