![]() You'll see a pop-up dialog box explaining how to proceed, and the Attachments tab opens (Figure 5). In the Remove Hidden Information tab, click Show preview nested below the File attachments (2 items) heading. There's no need for attaching files in the sample though. You'll see the same metadata as in the original document, but now the fields are active so you can make any necessary changes.įile attachments: I often work with file attachments when designing as a convenient way to organize assets for a project. To make changes to the metadata, choose File > Properties to open the dialog box (Figure 4). But you may not want to keep the document description circled in the figure! In some circumstances, you may want to keep identifying information about the project author. Some types of hidden information shows on the page when using specific tools, other types in various panels and some types are difficult to find. If there are fields or signature fields in your document and you choose to remove them, Acrobat X flattens the fields, removing actions and calculations associated with the fields, too. Note: Acrobat X treats digital signatures and form fields the same way. If you decide to keep an item, just deselect the check box. The expanded results list gives you tools to learn more about what's in your file. With the exception of digital signatures, an index and form fields, the sample document has all types of hidden content. Click the (+) icon to expand the list items. Tip: To see all the items Acrobat X checks, click the menu button (circled in Figure 2) and choose Show All Items to display the full list shown in Figure 2. The project has many types of hidden content, shown in the left panel. Acrobat X processes the file and shows the results in the panel (Figure 2).įigure 2: Run the command to examine the file. In the Hidden Information section of the panel, click Remove Hidden Information. Click Tools to open the panel and then click the Tools panel's drop-down menu to open a list of tool sets and click Protection (circled in Figure 2). Use the Hidden Information command to list hidden content. I added some objects in Acrobat as part of the document-development process, and others when simulating working with the file. Some came along with the converted PDF file based on the export settings chosen in Adobe InDesign, the source program. There are more items in the sample file than those you see or hear. Closing the file reveals a JavaScript message.įigure 1: The simple invitation. It's the sort of document you might want to use for a theme-party invitation (Figure 1). The single-page sample project includes some animated text, the sound of bongo drums and an image of said drums. NOTE: Download and open the sample file: Download In this article, you'll see how to track down hidden items, and what to do about them. But do you know what's actually in your document aside from the text and images you see on the page?Īt the risk of sounding paranoid, do you realize how many objects can hide inside a PDF document? Although some objects are obvious, others won't show themselves without some digging. You may have used PDF passwords or even electronic signatures to add security to your document, protecting the content from unwanted changes or printing. In this tutorial, learn how to protect PDF and the steps you can take to protect your file by removing hidden information.
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