Re: @unnumbered sections, FastBack and FastForward

> It seems to me that Prev, Next, FastForward, and FastBack should work. 
> Can an @unnumbered section have a subsection?  If so, then FastForward 
> should go to the beginning of the next section and Next should go to the 
> subsection.  And the reverse for Prev and FastBack, of course.  If 

Right, agreeed. (although I think you use Next and Prev for Forward Back,
but it is not really problematic).

> @unnumbered sections cannot have subsections, then FastBack and 
> FastForward could do the same thing as Prev and Next.  I don't think any 

As there are unnumbered subsectioning commands, FastBack and FastForward are
not trivial.

> of those nav buttons should be unclickable, with the exception of Prev 
> and FastBack in the first subsection, Next in the last subsection, and 
> FastForward in the last section.

Right.

Maybe this issue has a link with the problem with unnumbered in the
viper manual.

Pat