- Acrobat User Guide
- Introduction to Acrobat
- Workspace
- Workspace basics
- Opening and viewing PDFs
- Working with online storage accounts
- Acrobat and macOS
- Acrobat notifications
- Grids, guides, and measurements in PDFs
- Asian, Cyrillic, and right-to-left text in PDFs
- Workspace basics
- Creating PDFs
- Editing PDFs
- Edit text in PDFs
- Edit images or objects in a PDF
- Rotate, move, delete, and renumber PDF pages
- Edit scanned PDFs
- Enhance document photos captured using a mobile camera
- Optimizing PDFs
- PDF properties and metadata
- Links and attachments in PDFs
- PDF layers
- Page thumbnails and bookmarks in PDFs
- Action Wizard (Acrobat Pro)
- PDFs converted to web pages
- Setting up PDFs for a presentation
- PDF articles
- Geospatial PDFs
- Applying actions and scripts to PDFs
- Change the default font for adding text
- Delete pages from a PDF
- Scan and OCR
- Forms
- PDF forms basics
- Create a form from scratch in Acrobat
- Create and distribute PDF forms
- Fill in PDF forms
- PDF form field properties
- Fill and sign PDF forms
- Setting action buttons in PDF forms
- Publishing interactive PDF web forms
- PDF form field basics
- PDF barcode form fields
- Collect and manage PDF form data
- About forms tracker
- PDF forms help
- Send PDF forms to recipients using email or an internal server
- Combining files
- Combine or merge files into single PDF
- Rotate, move, delete, and renumber PDF pages
- Add headers, footers, and Bates numbering to PDFs
- Crop PDF pages
- Add watermarks to PDFs
- Add backgrounds to PDFs
- Working with component files in a PDF Portfolio
- Publish and share PDF Portfolios
- Overview of PDF Portfolios
- Create and customize PDF Portfolios
- Sharing, reviews, and commenting
- Share and track PDFs online
- Mark up text with edits
- Preparing for a PDF review
- Starting a PDF review
- Hosting shared reviews on SharePoint or Office 365 sites
- Participating in a PDF review
- Add comments to PDFs
- Adding a stamp to a PDF
- Approval workflows
- Managing comments | view, reply, print
- Importing and exporting comments
- Tracking and managing PDF reviews
- Saving and exporting PDFs
- Security
- Enhanced security setting for PDFs
- Securing PDFs with passwords
- Manage Digital IDs
- Securing PDFs with certificates
- Opening secured PDFs
- Removing sensitive content from PDFs
- Setting up security policies for PDFs
- Choosing a security method for PDFs
- Security warnings when a PDF opens
- Securing PDFs with Adobe Experience Manager
- Protected View feature for PDFs
- Overview of security in Acrobat and PDFs
- JavaScripts in PDFs as a security risk
- Attachments as security risks
- Allow or block links in PDFs
- Electronic signatures
- Printing
- Accessibility, tags, and reflow
- Searching and indexing
- Multimedia and 3D models
- Add audio, video, and interactive objects to PDFs
- Adding 3D models to PDFs (Acrobat Pro)
- Displaying 3D models in PDFs
- Interacting with 3D models
- Measuring 3D objects in PDFs
- Setting 3D views in PDFs
- Enable 3D content in PDF
- Adding multimedia to PDFs
- Commenting on 3D designs in PDFs
- Playing video, audio, and multimedia formats in PDFs
- Add comments to videos
- Print production tools (Acrobat Pro)
- Preflight (Acrobat Pro)
- PDF/X-, PDF/A-, and PDF/E-compliant files
- Preflight profiles
- Advanced preflight inspections
- Preflight reports
- Viewing preflight results, objects, and resources
- Output intents in PDFs
- Correcting problem areas with the Preflight tool
- Automating document analysis with droplets or preflight actions
- Analyzing documents with the Preflight tool
- Additional checks in the Preflight tool
- Preflight libraries
- Preflight variables
- Color management
About preflight results
You can view the results of a preflight inspection as a list, as comments, or individually in the Preflight dialog box. In the Results list, mismatches appear according to their severity, with all errors first, followed by warnings, and then just information. An alert icon appears next to each check that did not meet the criteria specified in the preflight profile.

The icons at the top of the Preflight dialog box indicate that
at least one issue of a particular severity has been found: the
red error icon , the
yellow warning icon
, and
the blue Info icon
for
information only (with no errors or warnings). The green check mark
means
that no problems were found.
View results in a list
The Preflight dialog box lists the issues flagged after an inspection that tests against the criteria specified in the selected profile.
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Run a preflight inspection.
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When the results appear, do any of the following:
If details are available, expand an area to see details about the problem object. Your Preflight preferences determine how many results, if any, are listed.
To see an object in a separate view, select Show In Snap.
To embed an audit trail, click Embed Audit Trail. You can embed an audit trail only if you used a profile to run the preflight inspection.
If you switched to a different view in the Preflight dialog box, click Results to get back to the Results list.
To see an object in context on the PDF page, double-click the item. The object is highlighted with a dotted line for easier identification. This option is useful when an object such as a font exists in multiple places in the document. In some cases, the item is an attribute of an object (for example, a color space). In those cases, the inspection finds the objects that use the attribute.
Note:You can change the type of line, its thickness, and its color on the Highlighting tab of Preflight preferences.
Problem object on the PDF page
Use Snap View to view a problem object
Use Snap View to isolate an item when you’re working with pages containing complex, overlapping areas. Some items, such as document information fields or page labels, cannot be displayed.
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Expand a results category to display the problem objects found during the inspection.
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Select a problem object in the list.
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Click Show In Snap.
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In the Preflight Snap View window, choose an option from the Background Color menu. All problem objects are displayed on this color in Snap View.Note:
You can click the arrow buttons to navigate through all of the results in this view. If the results panel is active, you can also use the arrow keys on the keyboard.
Snap view of problem object
View resources and general information
The Overview section of the Preflight dialog box lists all types of properties and resources for the document. It lists the color spaces, fonts, patterns, halftone settings, graphic states, and images used in the document. It also lists general information about the analyzed document. This information includes the application used to create it, the date it was created, and the date it was last modified.
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In the Results panel of the Preflight dialog box, expand the Overview and Preflight Information sections to view details.
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In the Overview section, expand a property to list the resources.
View results as comments
You can embed preflight results as comments in the PDF and then view them as you would any PDF comments. For example, you can choose Tools > Comment > Comments List in the right pane to list each comment (or filtered comment) in a list.
Insert and view preflight comments
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In the Results panel of the Preflight dialog box, choose Insert Results As Comments from the Options menu.
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If prompted, click Embed if you want to embed comments, regardless of how many exist.
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In the PDF, hold the pointer over a comment or click the sticky note for each comment to view its contents.
Sample PDF report with a sticky note
Remove preflight comments
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In Preflight dialog box, choose Remove Preflight Comments from the Options menu.
Embed an audit trail
When you embed an audit trail, a digital signature is added as well as the audit trail information. The audit trail information lists the profile used and the application that created it. It also specifies whether the preflight inspection succeeded.
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Run a preflight inspection using a full profile.
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When the results appear, click Embed Audit Trail.
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If an informational dialog box appears, click OK.
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Save the file and close the Preflight dialog box.
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To view basic Audit Trail information, click the Standards icon
in the navigation pane on the left. In the Standards panel, do any of the following, as needed:
To verify that the profile used on the document is the same as the profile on your local system, clickCheck Profile Fingerprint. For example, if you asked a customer to use a specific profile, you can use this check to confirm it was used.
To remove the audit trail, click Remove Preflight Audit Trail and save the file.
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To view additional Audit Trail information, choose File > Properties, and click Additional Metadata in the Description tab. Then in the dialog box, click Advanced. In the list, expand http://www.gwg.org/ns/gwg_preflight_v1. In addition to the basic preflight information, this list includes an overview of results, and the date and time the profile was executed.
You can overwrite an existing audit trail by embedding a new audit trail.
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