Re: address@hidden: some other observations on pcomplete]

[Richard Stallman]

    It could be useful, in addition, to be able to click on text in some 
    special way (e.g., with some modifier, like M-mouse-1), and be able to 
    customize the face(s) of that text.  That would help users who don't know 
    about list-faces-display.

That seems like a useful feature.  The same command could do this job
and also handle clicking on a line in list-faces-display.