How to Reply to a Comment in Word

You need to reply to a specific comment in a Word document to clarify a point, answer a question, or continue a threaded discussion. Word includes a built-in Reply button that attaches your response directly to the original comment, keeping the conversation organized. This article explains how to use the Reply feature in Word for Microsoft 365, Word 2021, and Word 2019. You will learn the exact steps for desktop, web, and mobile versions.

How the Reply Feature Works in Word

The Reply feature in Word is part of the modern commenting system introduced in Word 2019 and Microsoft 365. Each comment acts as a thread. When you reply, your text appears indented under the original comment with your name and timestamp. This keeps all feedback about one topic in a single location instead of scattered across the document margin.

You can reply to any comment, including ones made by other users. The feature works in the desktop app, Word for the web, and Word for mobile devices. Replies sync automatically when the document is saved to OneDrive or SharePoint. There is no limit to the number of replies per comment thread.

Before you start, make sure the document has at least one existing comment. If you do not see comments, go to the Review tab and click Show Comments to display them.

Steps to Reply to a Comment in Word

Method 1: Reply via the Comments Pane (Desktop App)

1. Open the Comments pane
   Click the Review tab on the ribbon. In the Comments group, click Show Comments. The Comments pane opens on the right side of the document.
2. Locate the comment you want to reply to
   Scroll through the list of comment threads in the pane. Each thread shows the original comment at the top and any existing replies below it.
3. Click the Reply button
   Hover over the comment thread. A small Reply button appears below the last reply. Click it. A text box opens with your name and a blinking cursor.
4. Type your reply
   Enter your response. You can format the text using the mini toolbar that appears above the text box. Use bold, italic, or bullet points if needed.
5. Post the reply
   Press Enter on your keyboard or click the Post button (paper airplane icon) to the right of the text box. Your reply appears indented under the original comment.

Method 2: Reply Directly in the Document Margin

1. Click the comment balloon
   In the document body, click the colored comment balloon or bracket next to the text. The comment thread opens in a pop-up box near the margin.
2. Click the Reply icon
   At the bottom of the pop-up box, click the curved arrow Reply icon. A text field appears.
3. Type and submit
   Write your response and press Enter. The reply is saved and visible in both the margin pop-up and the Comments pane.

Method 3: Reply in Word for the Web

1. Open the document in your browser
   Go to Office.com, sign in, and open the Word document from OneDrive or SharePoint.
2. Click a comment
   Click any comment balloon in the document. The Comments pane opens on the right.
3. Type in the reply field
   At the bottom of the comment thread, click inside the text box that says Write a reply. Type your response.
4. Press Enter or click Post
   Submit the reply. It appears immediately for all collaborators.

Method 4: Reply in Word for Mobile (iOS and Android)

1. Open the document in the Word app
   Launch the Word mobile app and open the document that contains comments.
2. Tap a comment marker
   Tap the colored comment indicator in the document. The comment thread expands.
3. Tap Reply
   At the bottom of the thread, tap Reply. The on-screen keyboard appears.
4. Type and send
   Enter your reply and tap the Send icon (paper airplane). The reply is posted and synced.

Common Mistakes and Limitations When Replying to Comments

Reply Button Is Grayed Out or Missing

If the Reply button is not clickable, the document might be in a read-only mode or you do not have edit permissions. Switch to Editing view by clicking Edit Document > Edit in Browser. If the document is protected, ask the owner to grant you edit access. On the desktop app, make sure you are not in Reading Mode. Go to the View tab and select Print Layout or Draft view.

Reply Does Not Appear After Posting

This usually happens when the document is not synced to the cloud. If you are working on a local copy, comments and replies are saved only to that file. To share replies with collaborators, save the document to OneDrive or SharePoint. In the desktop app, click File > Save As and choose a cloud location. After saving, replies sync automatically.

Cannot Reply to Resolved Comments

When a comment is marked as resolved, the Reply button disappears. To add a new reply, you must first reopen the comment. Right-click the resolved comment in the Comments pane and select Reopen Comment. After reopening, the Reply button becomes available again. The same applies to Word for the web — click the Reopen link at the top of the resolved thread.

Reply Is Posted as a New Comment Instead of a Reply

This occurs if you click New Comment instead of Reply. New Comment creates a separate thread unrelated to the existing one. Always use the Reply button or the reply text box within an existing thread. On the desktop app, you can also press Ctrl+Shift+M to insert a new comment, but that does not create a reply. Use the Reply button explicitly.

Reply Feature: Desktop App vs Word for the Web vs Mobile

Item	Desktop App	Word for the Web	Mobile App
Reply location	Comments pane or margin pop-up	Comments pane only	Expanded thread view
Reply method	Click Reply button or icon	Type in reply field	Tap Reply button
Formatting in reply	Bold, italic, bullets, numbered lists	Bold, italic, underline, bullet list	No formatting options
@mentions supported	Yes	Yes	No
Auto-sync	Requires cloud save	Automatic	Automatic
Reopen resolved comments	Right-click > Reopen Comment	Click Reopen link	Tap Reopen

You can now reply to any comment in Word using the method that matches your device and workflow. After posting a reply, check the thread to confirm it appears correctly. To improve collaboration, use @mentions to notify specific people and always save shared documents to a cloud location. For advanced commenting, explore the Resolve Comment and Delete Comment options in the Review tab.