Screen Problem

[Antonio Olivares]

Dear folks,

I have several machines running Fedora 16 fully updated to today's updates.  All have been behaving well, except for one.  The output on the screen is very big.  I have to use the mouse to scroll to see the activities button and to shutdown.  A student was using the machine when all of a sudden the screen became big.  I try to use another monitor and it does the same thing.  How can I reset the picture?

The screen capabilities are 1600x900, running Gnome 3.2, it seems that the magnifier is on, if it is how can I turn it off?

I appreciate your help/advice/comments.

Regards,

Antonio