changing brightness or levels only for viewing

[mcmahill@mtl.mit.edu]

Hi,

I have a scanned image that I'm cutting sections out of.  Its a grayscale
image and the brightness and contrast are just right for printing (which
is my final goal).  However, there are some sections that I just can't see
on the screen to cut out.  I'd like to change the brightness or maybe the
levels so I can see in the shadows for editing, but I don't want this to
affect how it prints.  Can I do that?

Thanks for any help.

please cc: me on any replys.

-Dan