How to Make PDF Form Fields Read-Only While Allowing Comments
Question details
The user needs to lock PDF form fields to make them read-only after completion, while still ensuring that recipients can use highlighting and commenting tools.

- Product
- Device & OS
- not provided
- Scenario
- Securing a PDF form post-submission to prevent data modification while keeping collaboration and review features active.
- Observed behavior
- Form fields must be restricted from further editing, but the separate commenting and annotation layers need to remain accessible to users.
Ensure you have the necessary administrative or owner permissions for the PDF document so you can modify form properties and document security settings.
Configure Form Fields as Read-Only via Properties
Manually set specific form fields to read-only to prevent text modification. This inherently allows annotation tools to function normally.
In PDF architecture, form fields and document annotations (like comments or highlights) operate on completely separate layers. Restricting the form fields alone will not disable the commenting features.
Launch your PDF editor and open the interactive PDF document you want to secure.
Navigate to the Form tab or toolset to reveal all interactive fields within the document.
Right-click the specific form field you want to lock and select 'Properties' from the context menu.
In the General tab of the Properties dialog, check the box labeled 'Read-only' and close the dialog.
Save your changes. Users will now be unable to alter the form data but can still use commenting tools.

Verify Document Security and Commenting Permissions
Check if global security settings or Reader-enabled extensions are improperly blocking users from adding comments.
Easily Manage PDF Form Properties with WPS Office
WPS Office offers a comprehensive PDF toolkit that lets you seamlessly edit form fields, configure read-only properties, and manage document commenting permissions without relying on complex scripting.
- 1. Open the PDF File: Launch WPS Office and open your interactive PDF form.
- 2. Access Form Controls: Navigate to the 'Form' tab on the top ribbon to view all interactive fields.
- 3. Set to Read-Only: Double-click the desired text field, go to Properties, and check the 'Read-only' option.
- 4. Verify Security: Head to the 'Protect' tab to ensure document permissions allow for commenting and annotations.

Frequently Asked Questions
Does running a script to lock form fields disable commenting tools?
No. Form fields and annotations are separate features in standard PDFs. A script that makes fields read-only and hides submit buttons does not inherently prevent users from adding highlights or comments.
Why are the commenting tools grayed out for recipients?
This usually happens if the PDF's security settings restrict commenting, or if the document was saved with specific 'Reader-enabled' rights or digital signatures that lock the entire file from modifications after submission.
Can I lock specific form fields but leave others editable?
Yes, you can set the 'Read-only' property on individual fields via the form field properties menu. This allows you to lock certain sections while leaving other fields and standard commenting fully active.




