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Be careful if you are exchanging PDFs that you have cropped with other parties. If you crop a PDF in Adobe Acrobat, even after you save it as a new file, and email it, another user can still open it in using different software.
As the screen grabs below show, it's possible to crop a PDF in Adobe Acrobat, and then undo the cropping action using Nuance Power PDF advanced.
The Tip of the Night for September 25, 2015, discussed the new standard filing format, PDF/A which allows for legal filings to digitally archived. If you’ve used Adobe Acrobat to save documents as PDF/A files you may have noticed that there are several different PDF/A types to choose from.
In Acrobat, if you go to File . . . Save as Other . . . Archivable PDF (PDF/A),
. . . .you will see that you have an option of eight different PDF/A options.
What is the difference between these?
PDF/A-1a bars the inclusion of audio or video files, and also prohibits the use of Java script or executable files. Encryption can also not be used, and fonts have to be embedded. PDF/A-1b differs from PDF/A-a in that it does not require that the 'logical structure' of a document be represented. So this Level B conformance can add in structural or source material not present in the source material.
PDF/A-2 files can include transparent layers, allow for JPEG 2000 compression, and have additional provisions for digital signatures. Crucially this standard also permits other PDF/A-2 files to be embedded in parent PDF/A-2 files. PDF/A-2a requires the logical structure be maintained, whereas PDF/A-2b does not. PDF/A-2u has to be exclusively in Unicode text, but does not need to have the logical structure of the source document.
PDF/A-3 allows the embedding of other files such as Word and Excel files in the archived PDF. In turn, PDF/A-3a retains the logical structure of the source; PDF/A-3b does not; and PDF/A-3u must use Unicode text.
If you need help finding the pages in a PDF which contain RGB color, install the Quite a Box of Tricks plug-in for Adobe Acrobat, which is available at this site, http://www.quite.com/products.htm . There is a demo version available, and a license costs $205. You may need to help the software locate your Adobe plug-in folder upon install.
When it installs successfully, it should show up in the Plug-Ins folder for Acrobat:
As the name implies, Quite a Box of Tricks, has several features. Click on the Info tab to access the tool which will help you find color pages:
As you can see, this plug-in also gives you the option to search for the largest image in a PDF. Choose the radio button for 'Search for RGB (or Lab) colour images in the document."
By click Next, you'll be able to jump to the pages with color images on them. Color text may be ignored.
