There is a simple magnification thingy built into the X windows system, not quite sure if it's supposed to be a screen magnifier or what, I suppose it is, but it's very quick and easy to use.
Funally the problems, it doesn't seem to follow the cursor, just the mouse, but there may be some settings to change somewhere.
Anyway, all you have to do is hit Control-Alt-Numberpad Plus together, hit it again to zoom in further, after it zooms to it's maximum it will pop back out to normal size, or you can use Control-Alt-Numberpad Minus to zoom out.
Just remember that it must be numberpad plus and minus.
Hope this is helpful.