I don't understand what you mean. Are you talking about when you're creating
the file or when you're in Slide Show view?
Usually you can just click to go to a hyperlink in the slide show. And you
can copy/paste a URL into the hyperlink box when you're creating the file.
So I don't understand what the problem is.
You did mention the Viewer. So I guess you're talking about clicking to go
somewhere during a slide show. This generally works, but check
http://www.pptfaq.com/FAQ00668.htm Maybe you're running into one of these
issues.
If that's not it, please give us more information about what exactly it is
you're having trouble with. Remember, we can't see what you're doing there,
so lots of details is good. :-)

Signature
Echo [MS PPT MVP] http://www.echosvoice.com
What's new in PPT 2007? http://www.echosvoice.com/2007.htm
Fixing PowerPoint Annoyances http://www.oreilly.com/catalog/powerpointannoy/
> Is it possible to click on hyperlinks from within the viewer instead of
> having to write the URL down and manually enter it? If not, is it possible
> in
> the 2007 viewer? It would be nice if I could at least copy/paste the
> hyperlinks from within the viewer(s).