The
key on the
Macintosh keyboard which is used to
type characters which are in the
character set but not on the
keyboard. For instance, you can type
letters with
accent marks over them,
non-English punctuation, and
math symbols.
On a PC you must use a special tool to do this, or else you must memorize character codes.
The Key Caps utility helps you find out what characters are supported in your current encoding and font.
See option-.