RE: change faces interactively

[Drew Adams]

> Sorry for my poor explanation. 
> What I want is an interactive function that turns on/off
> face changes by command.
> 
> Say, a buffer is in "my-mode".  The above
> (define-generic-mode ... ) will AUTOMATICALLY apply the face
> definitions to all characters as soon as the buffer is
> opened (assuming the mode definition recognizes its file extension).
> I would rather develop a function that applies the faces 
> AT WILL even after the buffer is opened IN THAT MODE.  
> For example, a buffer is in "my-mode" but none of the words
> in that buffer is applied with any faces.
> Now I will implement a function, (defun my-mode-face-1 ()  
> (interactive)...), then a certain set of words in that
> buffer is bold-faced.  After that, I will implement another
> function, (defun my-mode-face-2 () (interactive) ...), then
> another set of the words in that buffer is italic-faced. And so on...
> 
> If it does not make sense, please ask me again.  I appreciate it.

Sorry, I don't have much time right now - perhaps someone else can help.

If you just want to highlight stuff then perhaps have a look here:
http://www.emacswiki.org/emacs/FaceMenuPlus
http://www.emacswiki.org/emacs/HighlightLibrary