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

    Sign PDF documents

    PDF Expert allows you to easily sign PDF documents and forms. You can draw a signature with your finger or the Apple Pencil and save it for future use. This makes PDF Expert a perfect solution for signing PDFs on the go.

    Note: PDF Expert provides basic electronic signature capabilities by means of a signature tool. The legal framework for electronic signatures varies from country to country and the validity of electronic signatures depends upon the requirements of the receiving party of the contract. We recommend you consult a local attorney regarding your legal case, specify what constitutes a valid electronic signature in your country and jurisdiction and whether it is legally binding.

    Jump to:
    • Add a signature to PDF Expert
    • Sign PDFs
    • Sign PDFs with a Customer Signature
    • Delete a saved signature
    • Remove a signature from a document

    Add a signature to PDF Expert

    Mac iOS
    1. Open a PDF file and select the Annotate tab.
    2. Select the Signature  tool.
    3. Click a plus sign on the sidebar on the right.
    4. Select the Keyboard, Trackpad, or Image to type, draw, or upload an image of your signature.
    5. When using the Image option, you can tick the Convert white color to transparent setting and control the Tolerance level manually once the slider appears. 
    6. Choose the color and click Create.
    7. When finished working with signatures, click  in the top toolbar to exit the Add Signature mode. To exit the Annotate mode, click the Annotate tab in the top.
    1. Open a document you want to sign.
    2. Select Fill & Sign on the top toolbar.
    3. Tap Signature .
    4. Tap Create New Signature.
    5. Scribble your signature. You can select color and thickness on the top toolbar.

    Sign PDFs

    Mac iOS
    1. Open a PDF file and select the Annotate tab.
    2. Select the Signature  tool.
    3. Choose a signature on the sidebar on the right and click it.
    4. Click where you want the signature to be inserted. You can use one signature multiple times. If needed, change the signature’s color on the right.
    5. When finished working with signatures, click  in the top toolbar to exit the Add Signature mode. To exit the Annotate mode, click the Annotate tab in the top.

    Here’s an alternative way to sign a PDF:

    1. Launch PDF Expert and open the needed file.
    2. Right-click where you'd like the signature to be inserted.
    3. Select My Signature and click the signature.
    1. Open a document you want to sign.
    2. Select Fill & Sign on the top toolbar.
    3. Tap Signature .
    4. Choose a signature and tap it.
    5. Tap where you want to insert the signature.
    6. You can move and resize the signature in a document.

    Note: If you need to sign an interactive form, just tap the active signature field to paste your signature. Learn more about filling out forms in PDF Expert.

    Here’s an alternative way to sign a PDF:

    1. Tap and hold on a place in a document where you want to add a signature.
    2. In a pop-up menu, select Signature.

    Sign PDFs with a Customer Signature

    Customer Signature is a one-time signature which isn’t saved in the app and can’t be copied to other documents.

    Mac iOS
    1. Launch PDF Expert and open the needed file.
    2. Right-click where you'd like the signature to be inserted.
    3. Select Customer Signature.
    1. Open a document you want to sign.
    2. Select Fill & Sign on the top toolbar.
    3. Tap Signature .
    4. To add your own signature, tap Create New Signature.
    5. Select Customer Signature. 
    6. Scribble your signature. You can select color and thickness on the top toolbar.
    7. Tap where you want to insert a signature.
    8. You can move and resize a signature in a document.

    Delete a saved signature

    Mac iOS
    1. Open a PDF file and select the Annotate tab.
    2. Select the Signature  tool.
    3. Choose a signature on the sidebar on the right and right-click it.
    4. Click Delete.
    1. Open any PDF document.
    2. Tap Fill & Sign on the toolbar.
    3. Select Signature .
    4. Tap Select at the top right.
    5. Tap a signature you wish to remove.
    6. Select the trash can icon at the top left.
    7. Tap Done.

    Remove a signature from a document

    Mac iOS
    1. Open the file you signed in PDF Expert.
    2. Click a signature in the document and press the Delete key. Alternatively, you can right-click the signature > Delete.

    Video Tutorial


    1. Open the file you signed in PDF Expert.
    2. Tap a signature in the document.
    3. In a pop-up menu, select Delete.
    Read next: Insert stamps to PDFs
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    Features

    • Edit PDF
    • Fill PDF
    • Sign PDF
    • Merge PDF

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