Fix Added PDF Text Not Appearing When Embedded in Outlook
Question details
Text, comments, or annotations added to a PDF do not display when the file is embedded as an object within an Outlook email.

- Product
- PDF Editors / Microsoft Outlook
- Device & OS
- not provided
- Scenario
- Embedding a PDF document containing text annotations or comments into a Microsoft Outlook email message.
- Observed behavior
- The embedded PDF only displays the base document; added text, comments, and annotations are completely hidden, even though they appear correctly when the file is sent as a standard attachment.
Before proceeding, ensure you save a backup copy of your original PDF with editable comments, as flattening the document will make the annotations permanent and uneditable.
Flatten the PDF Comments Before Embedding
Convert dynamic annotations and comments into static page content to ensure compatibility with Outlook's built-in PDF viewer.
The Outlook PDF integration uses a basic viewer that often fails to render interactive elements like comments, sticky notes, or form fields. By flattening the PDF, you merge these interactive layers into the base document, ensuring they are permanently visible regardless of the software used to view them.
Launch your preferred PDF editor (such as Adobe Acrobat or WPS Office) and open the PDF containing the missing text or comments.
Navigate to the 'File' menu and select 'Print'. Alternatively, if your software has a dedicated 'Flatten' tool, select that option from the document properties or editing toolbar.
In the print dialog, choose 'Microsoft Print to PDF' or your software's built-in PDF printer. Ensure the setting to print 'Document and Markups' or 'Comments' is enabled.
Click 'Print' or 'Save' to generate a new flattened PDF file. Save this to your local drive with a recognizable name.
Open Microsoft Outlook, create your email, and embed the newly flattened PDF file as an object. Your added text will now display correctly.

Easily Flatten and Share PDFs with WPS Office
WPS Office provides a seamless way to view, edit, and flatten PDFs, ensuring your comments and annotations remain visible no matter where you embed or share them.
- 1. Open the PDF in WPS Office: Launch WPS Office and open your PDF document containing the annotations.
- 2. Access the Print Menu: Click on the 'Menu' at the top left and select 'Print', or use the shortcut Ctrl+P.
- 3. Include Comments: In the 'Print Content' drop-down, select 'Document and Comments' to ensure your added text is included.
- 4. Export to PDF: Select 'Export to PDF' as your printer and click 'Print' to save the flattened version for Outlook.

Frequently Asked Questions
Why do comments show when attached but not when embedded in Outlook?
When a PDF is attached, the recipient opens it using a dedicated PDF reader which fully supports interactive layers. When embedded, Outlook uses a basic internal previewer that only renders the static base layer of the document, ignoring comments and annotations.
Can I unflatten a PDF after embedding it in an email?
No. Flattening a PDF permanently merges the annotations into the base document layer. You cannot reverse this process, which is why it is highly recommended to keep a backup copy of the original, editable file.
Is there a way to display PDF text in Outlook without flattening?
If you do not want to flatten the PDF, you can take a screenshot of the relevant section of the PDF (with comments visible) and paste the image directly into the Outlook email body, while attaching the original PDF file normally.




