Key Caps in Panther?

Mac OS X and earlier versions used to include a nice nifty utility, Key Caps. In How to type accented characters we showed you the method of typing special characters as well as two screenshots from Key Caps.

The problem with Mac OS X 10.3 Panther, the Key Caps is gone.
(You might still have a copy of it if your Panther is upgraded from previous version.)

Now, there's something called “Keyboard Viewer”, accessible from your Input Menu.
To enable it:
System Preferences | International | Input Menu | Keyboard Viewer

(Screenshot of the Keyboard Viewer from a PowerBook.)