Try turning off the crop region (there is an icon at the bototm of the
window for this) and see if the levels are just way off in space somewhere
(zoom out to see). I had this happen to a client once, and this is how we
found them. If they are way off in space, you can drag them back to the view
area, and then turn the crop region on again.
--
paul
Paul F. Aubin
Paul F. Aubin Consulting Services
paubin@paulaubin.com
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