PDF Expert
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    Contents
    • Using PDF Expert
      • Getting Started with PDF Expert
      • Highlight, underline, and strikethrough text
      • Text comments, shapes, and pop-up notes
      • Insert stamps to PDFs
      • Customize text and annotation colors
      • Draw on a PDF file
      • Use stickers in PDF Expert for iOS
      • View, search, and remove annotations
      • Export Annotation Summary
      • Content Selection Tool
      • Edit text in PDF files
      • Work with images in PDFs
      • Work with to-page and to-web links
      • Remove sensitive content
      • Supported forms and fields
      • Fill out PDF forms
      • Sign PDF documents
      • Enhance and adjust your scans
      • Convert scanned documents into text (OCR)
      • Scale and measure drawings
      • Polygon and polyline shapes
      • Red Line tools
      • Convert images, MS Office and iWork files to PDF
      • Export PDFs to other formats on Mac
      • Convert PDFs to images, Word, Excel, PowerPoint, Text files on iOS
      • Reading mode
      • Select your way to scroll pages
      • Enable the two-page view
      • Zooming modes in PDF Expert
      • Jump to a specific page
      • Bookmark pages
      • Create a table of contents in a PDF file
      • Turn on the Night or Sepia theme
      • Read PDF text out loud
      • Keep your device awake while reading
      • View two PDFs side by side
      • Add page numbers, bates numbers, and text
      • Use Smart Search
      • AI Chat with PDF
      • Page number indicator
      • Create a new PDF file
      • Add, delete, and rearrange PDF pages
      • Rename files and folders
      • Recents and Favorites
      • Sort files and folders by name, date, and size
      • Password protect PDFs
      • Save the file as flatten
      • Reduce the PDF file size
      • Merge PDFs
      • Manage annotated pages
      • Move files and folders
      • Switch between the Grid and List views
      • Mark files and folders with color tags
      • Open a file in PDF Expert
      • Organize your files with Inbox
      • Page Resize
      • Access your device files via the Files app folder
      • Sync your PDF files through web clouds
      • Sync a folder from cloud storage
      • Connect to Mac or PC via SMB
      • Set up sync with Mac via SFTP
      • Time Capsule setup
      • Share files via the Share button
      • Transfer files between iOS device and desktop using Wi-Fi
      • Transfer files from Safari to PDF Expert for iOS
      • Transfer files between iPad and iPhone using WebDAV
      • Share text with other apps
      • Share files from cloud via a link
      • Transfer files between PDF Expert and your Mac using a USB cable
      • PDF Expert Widgets
      • Turn on the Dark Mode
      • Work with tabs on your iPad
      • Customize the toolbar in PDF Expert for iOS
      • Create your own toolset in PDF Expert for iOS
      • Make PDF Expert your default PDF viewer on Mac
      • Open email attachments in PDF Expert
      • Keyboard Shortcuts
      • Make presentations with PDF Expert and FaceTime
      • Full Screen Mode on Mac
      • Getting Started with Tools tab on Mac
      • Presentation Mode
      • Improve your workflow with Sidecar and Camera Continuity
      • Change the app's language on iOS
      • Convert PDF to black and white on Mac
      • Supported Scripting in AcroForms (Adobe Acrobat forms)
      • Supported Scripting in XFA (LiveCycle Designer forms)
      • URL schemes
    • Troubleshooting
      • PDF Expert quits or doesn't open
      • PDF Expert freezes
      • All files in the app look blank
      • Annotation tools do not work
      • Printing issues on Mac
      • Corrupted files
      • Sync issues
      • Restore accidentally deleted files
      • File cannot be opened
      • Annotations made in PDF Expert are not displayed correctly in a third-party app on iOS
      • File loads slowly
      • Garbled text
      • AI Chat with PDF issues
      • Connection issues on iOS
      • iCloud files don't stay downloaded
    • Billing & Subscription
      • How to get PDF Expert
      • Set up an account for cross-platform app usage
      • How to get PDF Expert Premium
      • Check and manage your subscription
      • How to cancel the free trial
      • The PDF Expert License FAQ
      • The “trial expired” message appears after a purchase
      • Is PDF Expert available on Windows?
      • The PDF Expert Billing FAQ
      • The difference between PDF Expert 2 and PDF Expert 3
    • Contact us

    PDF Expert quits or doesn't open

    On some occasions, PDF Expert might have problems with performance resulting in crashes - here are some troubleshooting steps to try:

    PDF Expert crashes

    Mac iOS

    First, please reboot your iPhone or your iPad.

    Another temporary solution would be the following:

    1. Try disabling iCloud for PDF Expert: open iOS settings >  iCloud > iCloud Drive > disable PDF Expert toggle.
    2. Disconnect from the internet. 

    Note: If you're unable to access your files in PDF Expert, you can access them in the Files app > PDF Expert location.  

    If none of it helps, please send us the crash logs by following the steps below - we're happy to help you personally. 

    1. Open the iOS Settings app > Privacy > scroll down and tap Analytics > Analytics data.
    2. Find the latest PDF Expert crash log and send it at rdsupport@readdle.com. In your message, describe the issue. In the subject line, type "PDF Expert crashes". We will get back to you as soon as we can.
    1. If the app can be launched, check if you're running the latest version in PDF Expert > Check for Updates or alternatively on your Mac App Store account > Updates.
    2. If the app crashes upon launch, restart the app by clicking Force Quit on the app's icon in the dock.
    3. On your Mac, choose Apple menu > System Settings, then click Control Center in the sidebar. (You may need to scroll down.)
    4. Find “Recent documents, applications, and servers,” click the pop-up menu next to it and then set to None.

    If none of it helps, please send us the logs at rdsupport@readdle.com by following the steps below - we're happy to help you personally.

    PDF Expert doesn't open

    Mac iOS
    1. Try disabling iCloud for PDF Expert: open iOS settings >  iCloud > iCloud Drive > disable PDF Expert toggle.
    2. Disconnect from the internet. 
    1. Try to Force Quit the app using the Apple Menu > Force Quit > PDF Expert.
    2. Choose to generate the log for Apple.
    3. Copy the log using the CMD+A combination.
    4. Paste the log to the email body. In your message, also describe the issue. In the subject line, type "PDF Expert crashes".
    5. Click Send.

    Note: Since PDF Expert for Mac doesn't have a folder structure, all your files are safely stored on your computer and can be opened with any other PDF viewer app, for instance, the Preview app. 

    Read next: PDF Expert freezes
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    Features

    • Edit PDF
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    • Sign PDF
    • Merge PDF

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