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Adobe Acrobat

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  1. Acrobat User Guide
  2. Introduction to Acrobat
    1. Access Acrobat from desktop, mobile, web
    2. What's new in Acrobat
    3. Keyboard shortcuts
    4. System Requirements
  3. Workspace
    1. Workspace basics
    2. Opening and viewing PDFs
      1. Opening PDFs
      2. Navigating PDF pages
      3. Viewing PDF preferences
      4. Adjusting PDF views
      5. Enable thumbnail preview of PDFs
      6. Display PDF in browser
    3. Working with online storage accounts
      1. Access files from Box
      2. Access files from Dropbox
      3. Access files from OneDrive
      4. Access files from SharePoint
      5. Access files from Google Drive
    4. Acrobat and macOS
    5. Acrobat notifications
    6. Grids, guides, and measurements in PDFs
    7. Asian, Cyrillic, and right-to-left text in PDFs
  4. Creating PDFs
    1. Overview of PDF creation
    2. Create PDFs with Acrobat
    3. Create PDFs with PDFMaker
    4. Using the Adobe PDF printer
    5. Converting web pages to PDF
    6. Creating PDFs with Acrobat Distiller
    7. Adobe PDF conversion settings
    8. PDF fonts
  5. Editing PDFs
    1. Edit text in PDFs
    2. Edit images or objects in a PDF
    3. Rotate, move, delete, and renumber PDF pages
    4. Edit scanned PDFs
    5. Enhance document photos captured using a mobile camera
    6. Optimizing PDFs
    7. PDF properties and metadata
    8. Links and attachments in PDFs
    9. PDF layers
    10. Page thumbnails and bookmarks in PDFs
    11. Action Wizard (Acrobat Pro)
    12. PDFs converted to web pages
    13. Setting up PDFs for a presentation
    14. PDF articles
    15. Geospatial PDFs
    16. Applying actions and scripts to PDFs
    17. Change the default font for adding text
    18. Delete pages from a PDF
  6. Scan and OCR
    1. Scan documents to PDF
    2. Enhance document photos
    3. Troubleshoot scanner issues when scanning using Acrobat
  7. Forms
    1. PDF forms basics
    2. Create a form from scratch in Acrobat
    3. Create and distribute PDF forms
    4. Fill in PDF forms
    5. PDF form field properties
    6. Fill and sign PDF forms
    7. Setting action buttons in PDF forms
    8. Publishing interactive PDF web forms
    9. PDF form field basics
    10. PDF barcode form fields
    11. Collect and manage PDF form data
    12. About forms tracker
    13. PDF forms help
    14. Send PDF forms to recipients using email or an internal server
  8. Combining files
    1. Combine or merge files into single PDF
    2. Rotate, move, delete, and renumber PDF pages
    3. Add headers, footers, and Bates numbering to PDFs
    4. Crop PDF pages
    5. Add watermarks to PDFs
    6. Add backgrounds to PDFs
    7. Working with component files in a PDF Portfolio
    8. Publish and share PDF Portfolios
    9. Overview of PDF Portfolios
    10. Create and customize PDF Portfolios
  9. Sharing, reviews, and commenting
    1. Share and track PDFs online
    2. Mark up text with edits
    3. Preparing for a PDF review
    4. Starting a PDF review
    5. Hosting shared reviews on SharePoint or Office 365 sites
    6. Participating in a PDF review
    7. Add comments to PDFs
    8. Adding a stamp to a PDF
    9. Approval workflows
    10. Managing comments | view, reply, print
    11. Importing and exporting comments
    12. Tracking and managing PDF reviews
  10. Saving and exporting PDFs
    1. Saving PDFs
    2. Convert PDF to Word
    3. Convert PDF to JPG
    4. Convert or export PDFs to other file formats
    5. File format options for PDF export
    6. Reusing PDF content
  11. Security
    1. Enhanced security setting for PDFs
    2. Securing PDFs with passwords
    3. Manage Digital IDs
    4. Securing PDFs with certificates
    5. Opening secured PDFs
    6. Removing sensitive content from PDFs
    7. Setting up security policies for PDFs
    8. Choosing a security method for PDFs
    9. Security warnings when a PDF opens
    10. Securing PDFs with Adobe Experience Manager
    11. Protected View feature for PDFs
    12. Overview of security in Acrobat and PDFs
    13. JavaScripts in PDFs as a security risk
    14. Attachments as security risks
    15. Allow or block links in PDFs
  12. Electronic signatures
    1. Sign PDF documents
    2. Capture your signature on mobile and use it everywhere
    3. Send documents for e-signatures
    4. About certificate signatures
    5. Certificate-based signatures
    6. Validating digital signatures
    7. Adobe Approved Trust List
    8. Manage trusted identities
  13. Printing
    1. Basic PDF printing tasks
    2. Print Booklets and PDF Portfolios
    3. Advanced PDF print settings
    4. Print to PDF
    5. Printing color PDFs (Acrobat Pro)
    6. Printing PDFs in custom sizes
  14. Accessibility, tags, and reflow
    1. Create and verify PDF accessibility
    2. Accessibility features in PDFs
    3. Reading Order tool for PDFs
    4. Reading PDFs with reflow and accessibility features
    5. Edit document structure with the Content and Tags panels
    6. Creating accessible PDFs
  15. Searching and indexing
    1. Creating PDF indexes
    2. Searching PDFs
  16. Multimedia and 3D models
    1. Add audio, video, and interactive objects to PDFs
    2. Adding 3D models to PDFs (Acrobat Pro)
    3. Displaying 3D models in PDFs
    4. Interacting with 3D models
    5. Measuring 3D objects in PDFs
    6. Setting 3D views in PDFs
    7. Enable 3D content in PDF
    8. Adding multimedia to PDFs
    9. Commenting on 3D designs in PDFs
    10. Playing video, audio, and multimedia formats in PDFs
    11. Add comments to videos
  17. Print production tools (Acrobat Pro)
    1. Print production tools overview
    2. Printer marks and hairlines
    3. Previewing output
    4. Transparency flattening
    5. Color conversion and ink management
    6. Trapping color
  18. Preflight (Acrobat Pro)
    1. PDF/X-, PDF/A-, and PDF/E-compliant files
    2. Preflight profiles
    3. Advanced preflight inspections
    4. Preflight reports
    5. Viewing preflight results, objects, and resources
    6. Output intents in PDFs
    7. Correcting problem areas with the Preflight tool
    8. Automating document analysis with droplets or preflight actions
    9. Analyzing documents with the Preflight tool
    10. Additional checks in the Preflight tool
    11. Preflight libraries
    12. Preflight variables
  19. Color management
    1. Keeping colors consistent
    2. Color settings
    3. Color-managing documents
    4. Working with color profiles
    5. Understanding color management

Before you begin

We are rolling out a new, more intuitive product experience. If the screen shown here doesn’t match your product interface, switch to the help for your current experience.

Enhance scanned file or camera images for clear PDFs

You can capture document photos with your smartphone and use the Enhance camera image feature to create polished, clear, and compact PDFs without needing a standard scanner. This feature addresses common issues in mobile-captured images, such as incorrect perspectives, areas beyond boundaries, shadows, and inconsistent lighting. While it may not eliminate all problems, it significantly improves the overall quality of your resulting PDF.

To enhance a camera image:

  1. Open the photograph or image of the document in Acrobat.

  2. From the All tools menu, select Scan & OCR.

  3. From the left panel, select Enhance camera image and then from the dialog that opens, select Enhance.

    The image is enhanced and a PDF of the image is shown.

    Use Acrobat Reader Desktop to enhance photos captured on mobile camera.

  4. To further adjust the default enhancement level, drag the Adjust enhancement level slider in the secondary toolbar.

    Use Acrobat Reader Desktop to enhance photos captured on mobile camera.

  5. If required, adjust the page border using the blue circle handles at the corners of the photo. Select Enhance.

  6. Save the PDF file.

To enhance a scanned file:

  1. Open the scanned file in Acrobat.

  2. From the All tools menu, select Scan & OCR > Enhance scanned file.

  3. In the pop-up dialog box, choose the Pages you wish to enhance and select Recognize text to identify text within the document.

  4. Optionally, select Settings   to access the Enhance Scanned PDF dialog box and adjust image filtering and compression options as needed for quality, size, or specific scanning issues.

    Settings

    Details

    Apply Adaptive Compression

    Divides each page into black-and-white, grayscale, and color regions and chooses a representation that preserves appearance while highly compressing each type of content. The recommended scanning resolutions are 300 dots per inch (dpi) for grayscale and RGB input, or 600 dpi for black-and-white input.

    Color/Grayscale

    When scanning color or grayscale pages, select one of the following:

    • JPEG- Applies JPEG compression to the colored image content.
    • JPEG2000- Applies JPEG2000 compression to the colored image content. (This setting is not recommended when creating PDF/A files. Use JPEG instead.)
    • ZIP- Applies ZIP compression to the colored image content.

    Monochrome

    When scanning black-and-white or monotone images, select one of the following:

    • CCITT Group 4- Applies CCITT Group 4 compression to black-and-white input page images.
    • JBIGT (Lossless) and JBIGT (Lossy)- Applies the JBIG2 compression method to black-and-white input pages. The highest-quality levels use the lossless method; the text is highly compressed at lower settings. Text pages typically are 60% smaller than CCITT Group 4 compressed pages, but processing is slow.

    Small Size/High Quality

    Sets the balance point between file size and quality.

    Filters
    • Deskew- Rotates any page that is not square with the sides of the scanner bed, to make the PDF page align vertically. Choose On or Off.
    • Background removal- Rotates any page that is not square with the sides of the scanner bed, to make the PDF page align vertically. Choose On or Off.
    • Descreen- Removes halftone dot structure, which can reduce JPEG compression, cause moire patterns, and make text difficult to recognize. Suitable for 200–400-dpi grayscale or RGB input or, for Adaptive Compression, 400–600-dpi black-and-white input. The On setting (recommended) applies the filter for 300 dpi or higher grayscale and RGB input. Select Off when scanning a page with no pictures or filled areas, or when scanning at a resolution higher than the effective range.
    • Text Sharpening- Sharpens the text of the scanned PDF file. The default value is low and suitable for most documents. Increase it if the quality of the printed document is low and the text is unclear.

     

    Text Recognition Options
    • Document Language- Specifies the OCR engine's language to identify the characters.
    • Output- Determines the type of PDF to produce. All options require an input resolution of 72 dpi or higher (recommended). All formats apply OCR, font, and page recognition to the text images and convert them to normal text.

  5. Select Enhance.

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