Apple Mac Performa 640 series - Manual (Page 159)

Typing special characters and symbols
In the Mac OS, you can type a variety of international and other special
symbols and characters (including characters with diacritical marks, such as
accents) by pressing combinations of keys.
The Key Caps program, which is installed with your system software, shows
you the characters produced when you type certain keys and key
combinations in the fonts available on your computer. Choose Key Caps from
the Apple (K) menu, then choose the font from the Key Caps menu.
To have Key Caps show more options for special characters, press each of
these keys or key combinations: Option, Shift, Shift-Option, Shift-x, and
Option-x.
If you press the Option key, Key Caps lightly outlines the keys that you can
use in combination with letter keys to type letters with accents or other
diacritical marks.
151 Special Keys on Your Keyboard
Characters available
in the Chicago font
Characters appear
here when you press
keys on the keyboard
or click them in
the window.
Characters available
in the Chicago font
when the Option key
is pressed
The highlighted key represents the
key held down on the keyboard—
in this case, the Option key.