Function keys
– users must either remember each key's function, identify them from the
screen's display, or use a template over the keys in order to identify them
properly
– can reduce number of keystrokes and errors
– meaning of each key can change with each application
– placement on keyboard can affect efficient use
– special-purpose displays often embed function keys in monitor bezel
– lights next to keys used to indicate availability of the function, or on/off
status
– typically simply labeled F1, F2, etc, though some may also have meaningful
labels, such as CUT, COPY, etc.
– frequent movement between keyboard home position and mouse or
function keys can be disruptive to use
– alternative is to use closer keys (e.g. ALT or CTRL) and one letter to
indicate special function