I was sent a hardcopy of a 10-page scanned document and it has a dark grey background. I need to make a pdf of it. Is there a way I can remove the grey background from the pages using Adobe Acrobat Pro DC?
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You should use an image editing application (like Photoshop) to do that.
It's a hardcopy that was printed from a scan probably too many times and now there is just so much noise in the background that it is really speckled. If I use Photoshop, do I have to select and then select the inverse? This seems like it would take too much time. Is there a way in PS to just lighten the background of a multi-page pdf?