Updating Graphics In Existing PDFs
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PDFzone
2000

Abstract:

Adobe's built-in way to edit and replace images is fairly slick. Start out by checking your preferences--choose File > Preferences > TouchUp. The two applications listed here will be used for editing bitmap and vector images, respectively, so make sure these are the programs you want to use for those purposes. Remember, though, that only Adobe Photoshop and Adobe Illustrator will be able to send the images back to Acrobat without any additional work on your part.