Apple PowerBook G3 - Manual (Page 117)

Typing special characters and symbols
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.
117 Using Your Keyboard
Characters appear
here when you press
keys on the keyboard
or click them in
the window.
The highlighted key represents the
key held down on the keyboard—
in this case, the Option key.
Characters available
in the Chicago font
Characters available
in the Chicago font
when the Option key
is pressed