Comment Tools

Use comments tools to view, organize, summarize, and share feedback in a PDF. You can also import or export comments from multiple reviewers.

Comments pane overview 

The Comments pane allows you to: 

• View all comments in one place  

• Sort and filter feedback  

• Navigate to comment locations in the document  

• Manage replies and annotations 

Summarize comments 

Use this feature to display all comments alongside the document content. 

Each comment appears as a callout on the page and is assigned an ID. A summary table lists all comments with details. 

Summarize comments as a PDF 

1. On the Review tab, in the Comments group, click Summarize Comments
    
2. Select a page range 
3. Click OK 

To configure options, click Settings in the dialog box.

Summarize comments for printing 

1. On the Review tab, in the Comments group, click Summarize Comments, then select Summarize Comments and Print
2. Select a page range 
3. Click OK 

To adjust print settings, click Settings in the dialog box.

To Edit Printing and Summarizing Preferences

1. On the File menu, click Preferences. The Nitro PDF Pro Preferences dialog appears.
2. Click Commenting to expand the entry, and choose Printing and Summarizing.
   
3. Configure printing and summarizing settings
4. Click Apply and OK to save your settings

Show or hide the Comments pane 

• Click the Comments tab in the sidebar to toggle visibility 

Sort comments 

1. Open the Comments pane 
2. Click Sort By 
3. Select a sorting option (for example, Type or Author) 

Expand or collapse comments 

In the Comments pane, you can: 

• Expand or collapse individual comments  

• Expand or collapse grouped comments  
  
  
• Select Expand All or Collapse All  

 Delete a comment 

1. In the Comments pane, select a comment 
2. Click Delete

Hide or show all comments 

• On the Review tab, in the Comments group, click Hide Comments to toggle visibility
   

Export comments 

1. On the Review tab, click the arrow next to Migrate, then select Export Comments
    
2. Save the file (FDF format) 
3. Repeat for each reviewed file 

Import comments 

1. Open the original PDF 
2. On the Review tab, click the arrow next to Migrate, then select Import Comments
3. Select an FDF file 
4. Click Open 
5. Repeat for additional files 

Reply to a comment 

1. Open a comment or pop-up note 
2. Enter your reply in the comment field 

Replies appear as threaded discussions in the Comments pane. 

Last updated: June 2026