[Framers] Entering codes for special characters/symbols

[Doug]

I've been working on special characters lately, determining the best way to
enter them is pretty confusing.

Some dialogs require a \x before the character code, others require just a
\, while others require \u.  Some codes are 2 characters, while others
require 4 characters, all for the same symbol.  Worse, some of the code
charts I've seen don't apply accurately to FrameMaker.

Can someone point me to a chart of the character codes and how they need to
be entered?  One that is accurate for Frame?  I feel like I'm trying to
chart a river that has already been mapped.

Thanks,

Doug