How to use the viewer:
You may drag the document freely in above window.
The buttons on the left are
The right mouse button (or <META>-mouse
button on one button systems) will pop
up a magnifyer glass.
If the cursor changes from "drag" to "hand" you may click to follow a link (this is also indicated by blue underlying text). The links target is shown in the status line on the bottom of the window.
To directly jump to a page, type the number followed by "g".
See here for more information on JDvi.