I would like to see my whole document at once, so it would be nice to have a viewer that can fill the screen with thumbnails. Is there any viewer for linux (or other) that can do that? I have tried a few with no luck.
Gnome's excellent default PDF viewer, Evince, does this. Just drag the side pane so that it fills the whole screen. It's very lightweight, too.
Evince's website links to a similar application for KDE called Okular (I haven't used it, but you might want to try it if you prefer Qt).