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Acrobat X Essential Training

Revealing and clearing hidden information


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Acrobat X Essential Training

with Anne-Marie Concepción

Video: Revealing and clearing hidden information

Sometimes it's not the content that you can see that'll get you; it's the content that you can't see. The PDF can contain information that is not immediately visible, like comments, or buttons, or links, even metadata, such as the author or copyright information. There is a lot of information associated with the PDF that's not immediately evident, and often you want to be able to locate that--what is all the hidden information?--so that you can have an opportunity to delete it. I mean somebody might have left in text that is potentially harmful to your business, or that can violate somebody's right to privacy.
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  1. 1m 53s
    1. Welcome
      1m 33s
    2. Using the exercise files
      20s
  2. 55m 0s
    1. Opening documents and moving them around
      6m 3s
    2. Working with the toolbars
      5m 59s
    3. Working with the panels
      3m 43s
    4. Customizing the toolbar with Quick Tools
      4m 40s
    5. Using the Pages panel to navigate
      3m 57s
    6. Selecting and copying text and graphics
      3m 24s
    7. Rotating pages
      4m 49s
    8. Changing the viewing options
      6m 12s
    9. Reviewing preferences
      7m 6s
    10. Finding words and phrases
      2m 35s
    11. Searching a PDF and working with the Search panel
      4m 21s
    12. Sharing PDFs by email and with Adobe SendNow
      2m 11s
  3. 33m 18s
    1. Creating PDFs from Microsoft Office applications
      9m 46s
    2. Creating PDFs from Creative Suite applications
      8m 57s
    3. Creating PDFs from within Acrobat Pro
      4m 27s
    4. Creating PDFs from a web site
      8m 22s
    5. Creating PDFs from the clipboard
      1m 46s
  4. 30m 58s
    1. Editing text
      8m 51s
    2. Adding text
      4m 40s
    3. Editing images and graphics
      3m 39s
    4. Changing the page number display
      3m 48s
    5. Digitally signing PDFs
      6m 26s
    6. Cropping pages and documents
      3m 34s
  5. 1h 6m
    1. Adding watermarks
      6m 17s
    2. Adding page backgrounds
      5m 41s
    3. Adding page numbers
      5m 56s
    4. Adding headers and footers
      9m 7s
    5. Adding bookmarks
      11m 30s
    6. Attaching files to a PDF
      7m 11s
    7. Adding metadata
      3m 45s
    8. Optimizing a PDF for file size and compatibility
      10m 12s
    9. Creating initial view settings
      7m 16s
  6. 37m 59s
    1. Adding hyperlinks to URLs
      7m 33s
    2. Creating links with the Link tool
      6m 9s
    3. Working with interactive actions
      6m 56s
    4. Creating and adding buttons
      6m 28s
    5. Adding video, sound, and SWF files
      7m 29s
    6. Adding page transitions
      3m 24s
  7. 27m 12s
    1. Extracting pages
      3m 53s
    2. Splitting a PDF into multiple files
      4m 13s
    3. Inserting pages from files and other sources
      5m 42s
    4. Moving, copying, and replacing pages
      8m 17s
    5. Combining PDFs
      5m 7s
  8. 27m 9s
    1. Exporting text
      8m 33s
    2. Exporting images
      6m 33s
    3. Exporting PDFs to Microsoft Word
      7m 21s
    4. Exporting PDFs to Microsoft Excel
      4m 42s
  9. 26m 27s
    1. Working with portfolios
      6m 57s
    2. Creating portfolios
      6m 26s
    3. Customizing portfolios
      7m 23s
    4. Optimizing backward compatibility
      5m 41s
  10. 32m 9s
    1. Creating an interactive form
      6m 42s
    2. Working with form fields
      6m 41s
    3. Editing field properties
      5m 34s
    4. Distributing and collecting forms
      9m 43s
    5. Enabling Reader to save form data
      3m 29s
  11. 34m 26s
    1. Adding sticky notes and other annotations
      9m 2s
    2. Using the drawing markup tools
      6m 10s
    3. Viewing, filtering, and replying to comments
      5m 24s
    4. Printing, summarizing, and exporting comments
      6m 35s
    5. Exporting comments to Word for Windows
      3m 28s
    6. Enabling extended commenting in Acrobat Reader
      3m 47s
  12. 25m 29s
    1. Understanding the different review processes
      2m 7s
    2. Using the email review process
      4m 33s
    3. Conducting a shared review with Acrobat.com
      6m 54s
    4. Using the Review Tracker
      4m 32s
    5. Using the Collaborate Live review process
      7m 23s
  13. 31m 2s
    1. Reviewing the print production tools
      5m 18s
    2. Previewing color separations
      3m 51s
    3. Using the Object Inspector to learn details
      3m 13s
    4. Working with the Preflight dialog box
      5m 34s
    5. Fixing hairlines
      3m 57s
    6. Converting colors
      2m 27s
    7. Saving as a standards-compliant PDF
      6m 42s
  14. 19m 16s
    1. Scanning a paper document to PDF
      4m 44s
    2. Setting up optimization options
      6m 48s
    3. Recognizing text in a scanned PDF
      4m 43s
    4. Reviewing and correcting OCR suspects
      3m 1s
  15. 17m 18s
    1. Using the built-in Actions for automation
      5m 32s
    2. Editing Actions
      4m 7s
    3. Creating new Actions
      4m 51s
    4. Sharing Actions with others
      2m 48s
  16. 35m 27s
    1. Choosing a security method
      5m 27s
    2. Password-protecting a PDF
      7m 28s
    3. Securing a PDF with a certificate
      5m 6s
    4. Creating a digital id
      5m 43s
    5. Removing sensitive content with the Redaction feature
      6m 52s
    6. Revealing and clearing hidden information
      4m 51s
  17. 33m 45s
    1. Opening and navigating PDFs in Reader
      7m 30s
    2. Adding comments
      3m 14s
    3. Viewing extended features
      6m 53s
    4. Digitally signing a PDF
      6m 15s
    5. Sharing PDFs
      2m 29s
    6. Using Acrobat.com
      7m 24s
  18. 3m 54s
    1. Final thoughts
      3m 54s

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Acrobat X Essential Training
8h 59m Beginner Nov 19, 2010

Viewers: in countries Watching now:

In Acrobat X Essential Training, author Anne-Marie Concepción demonstrates how to create, modify, review, and share PDFs in Adobe Acrobat X Standard or Pro. Starting with a tour of the new panels-based interface, the course covers the basics of the software, such as creating and customizing PDFs, searching, editing text and graphics, and extracting PDF content to use in other programs. Also included are tutorials on creating forms, inserting interactivity and rich media, using the prepress tools, combining PDFs with other types of files to create customized portfolios, and ensuring document security. Exercise files accompany the course.

Topics include:
  • Creating PDFs from web pages, Office files, and Creative Suite files
  • Signing PDFs with a digital signature
  • Creating interactive forms
  • Annotating PDFs with comments
  • Collaborating with others using PDF reviews
  • Making scanned documents searchable with OCR
  • Preparing documents for print with print production tools
  • Automating routine tasks with Actions
  • Securing PDFs with encryption and password-protection
  • Removing sensitive content with the Redaction feature
  • Sharing PDFs
  • Using the new features in Reader X and Acrobat.com
Subjects:
Business PDF
Software:
Acrobat
Author:
Anne-Marie Concepción

Revealing and clearing hidden information

Sometimes it's not the content that you can see that'll get you; it's the content that you can't see. The PDF can contain information that is not immediately visible, like comments, or buttons, or links, even metadata, such as the author or copyright information. There is a lot of information associated with the PDF that's not immediately evident, and often you want to be able to locate that--what is all the hidden information?--so that you can have an opportunity to delete it. I mean somebody might have left in text that is potentially harmful to your business, or that can violate somebody's right to privacy.

So, is there a way to quickly discover all that? Well, yes, there is. That's the point of this video. Open up the PDF and then go to Tools, down to Protection. You want to go all the way down here to Hidden Information. Click Remove Hidden Information, and a little panel opens up on the left that scans through the entire document and then lists all of the hidden information it found. It's a little misleading. It doesn't remove; it first finds it. So it finds the hidden information and then, you can click the Remove button to actually remove it all.

If you want to see what it found, it found metadata, one item, and if we reveal this in the document, what is the metadata, well it found the author. Oh my goodness! The author put her phone number, and the author has her e-mail address in here. I may not really want to post that on the web. It found a comment. Oh I thought we had already gotten rid of all the comments. Where is the comment? Show preview. Where is that? Anne-Marie accidentally pressed the Delete key here when she had the Text Selection tool selected, right.

That's a feature--not a bug--that you can do commenting with the Selection tool, and I forgot to get rid of that. There is hidden text. Where is the hidden text? Show me the preview. Well, apparently on page 3, there is information on how could this be hidden. So, show me the visible text. Show me both hidden and visible. So there is text overlying other text. So some text must have accidentally gotten behind. Let's see where that might be. It was right here. And if we go to the Tools > Content > Edit Object, I bet that somebody moved this.

Let's see if we can get this out of the way here. And look, so you can sort of see somebody dragged it down to cover something up. Maybe that's a way to get some secret information back and forth is that you cover up text with an object. But because we have our handy-dandy Remove Hidden Information panel, we can just delete it all together. So, you can delete individual items on your own, or you can use the Remove Hidden Information to remove everything. It found links. It found cropped content.

It found overlapping objects. Now, before I do this, I want to show you another method that if you really don't care what it finds--you just want to get rid of everything that's hidden, check out this tool. It's really great. It's like an elephant gun. It's called Sanitize Document. Click it and you're going to get an alert that lists everything it searches for and removes. It removes hidden data and metadata from your document, so that sensitive information is not inadvertently passed along. It removes metadata, embedded content, anything if you have attached files--it removes that.

Hidden layers, if you have embedded a search index, it removes that, any form data that you stored, any kind of obscure text and images like we just saw, comments, any links, any actions, any JavaScripts that are part of this, it removes. And on overlapping objects, it gets rid of the overlap. So, press OK to begin the sanitation process. Whenever I do this, I always expect like hoses to come out from the sides of my monitors like it's going through a carwash. Click OK. Now it says, "Where should we save this sanitized document," and I'll just call it clean, save it in the same folder.

Processing images, I'm not sure why it says, "Merging lines into curves." It always says that. Not quite sure what that's doing. And then it just goes away, and it's done. Apparently all information is gone that was hidden, and if you want, you can go ahead and try Remove Hidden Information to see if it finds anything. No, this document is clean. So, when you want to get rid of hidden information that may be a violation of somebody's privacy, or just contain some information that your recipients don't need to know about that aren't going to raise any bells with their virus protection or anything like that-- you just wanted a plain old PDF-- go to Tools > Protection > Hidden Information.

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