You have a Word document that sounds too formal, too casual, or just does not match the audience you need to reach. Rewriting an entire document manually takes hours and risks losing your original meaning. Copilot in Microsoft Word can rewrite selected text in a different tone — professional, casual, persuasive, or concise — while keeping your key points intact. This article explains how to use the Rewrite with Copilot feature to adjust tone, what prerequisites you need, and common mistakes to avoid.
Key Takeaways: Using Copilot to Change Tone in Word
- Copilot pane in Word > Draft with Copilot > Rewrite: Select text, open the Copilot pane, and choose “Rewrite” to see tone options.
- Copilot tone options: Professional, Casual, Persuasive, Concise — each adjusts vocabulary, sentence length, and formality.
- Microsoft 365 Copilot license required: The rewrite feature is not available in Copilot Pro or the free Copilot in Windows.
How Copilot Rewriting Works and What You Need
Copilot in Word uses a large language model trained on text patterns. When you ask it to rewrite, it analyzes the selected text for meaning, structure, and tone. It then generates a new version that matches the tone you choose while preserving the original facts, data, and intent. The feature does not change document formatting like fonts or margins — only the text content changes.
Before you start, verify these prerequisites:
- A Microsoft 365 subscription that includes Copilot for Microsoft 365. This is an add-on license available for business plans E3, E5, Business Standard, and Business Premium.
- Word for the web or Word desktop version 2312 or later. Check your version: File > Account > About Word.
- The document must be saved to OneDrive or SharePoint. Copilot cannot rewrite text in a local file.
- An active internet connection. The rewrite processing happens on Microsoft servers, not your device.
Steps to Rewrite a Word Document in a Different Tone
- Open the document in Word
Launch Word and open the document you want to edit. Make sure it is saved to OneDrive or SharePoint. If you see a yellow banner saying “We need your permission,” click “Allow” to enable Copilot features. - Select the text to rewrite
Highlight the paragraph, sentence, or section you want to change. For best results, select at least one full sentence. Short phrases or single words may not produce useful rewrites. - Open the Copilot pane
On the Home tab, click the Copilot button on the right side of the ribbon. The Copilot pane opens on the right side of the screen. You can also press Alt + I to open the pane directly. - Click the Rewrite button
In the Copilot pane, locate the “Rewrite” button. It appears as a pen icon with the label “Rewrite.” Click it. Copilot will analyze the selected text and display a list of tone options. - Choose a tone
Select one of the four tone options:Professional: Formal vocabulary, longer sentences, third-person voice. Good for client proposals, business reports, and official correspondence.
Casual: Friendly vocabulary, shorter sentences, first-person voice. Good for team updates, internal newsletters, and informal emails.
Persuasive: Emotionally charged language, rhetorical questions, calls to action. Good for sales copy, fundraising appeals, and proposals.
Concise: Minimal words, bullet points, direct statements. Good for executive summaries, meeting notes, and action items. - Review the rewritten text
After you select a tone, Copilot displays a rewritten version in the pane. Read it carefully. Check that the meaning is correct and the tone matches your goal. You can click “Regenerate” to see another version if the first one is not right. - Apply the rewrite
If you are satisfied, click the “Replace” button at the bottom of the Copilot pane. The original selected text is replaced with the rewritten version. If you prefer to keep the original, click “Discard” instead. - Repeat for other sections
Move to the next section of text you want to rewrite. Repeat steps 2 through 7 for each section. You can use different tones in different parts of the same document.
Common Mistakes and Limitations When Rewriting Tone
Copilot changes the meaning of the original text
This happens when the selected text contains ambiguous phrases, jargon, or industry-specific terms. Copilot may interpret them incorrectly. To fix this, select a smaller portion of text — one or two sentences — and rewrite only that part. You can also add a clarifying sentence before rewriting, then delete it after the rewrite is applied.
Copilot does not offer tone options
The Rewrite button may be grayed out or missing entirely. This usually means your document is not saved to OneDrive or SharePoint. Save the file to a cloud location and try again. If the button is still missing, your Word version may be too old. Update Word through File > Account > Update Options > Update Now.
Copilot rewrites the entire document instead of selected text
This occurs if you do not select text before clicking Rewrite. Copilot assumes you want to rewrite the whole document. Always highlight the specific text first. If you accidentally rewrite the whole document, press Ctrl + Z to undo immediately.
The rewritten text sounds robotic or unnatural
Long paragraphs with complex sentence structures produce this result. Break the text into shorter paragraphs before rewriting. You can also select the “Casual” or “Concise” tone to get more natural phrasing. If the result is still poor, rephrase the original text manually first, then ask Copilot to rewrite it.
Copilot Tone Options Compared
| Feature | Professional | Casual |
|---|---|---|
| Best for | Client reports, legal documents, policy memos | Team chats, internal updates, blog posts |
| Sentence length | Long, complex | Short, simple |
| Vocabulary | Formal, technical | Everyday, conversational |
| Voice | Third person | First or second person |
| Example phrase | “The committee recommends the following action.” | “Let me suggest what we should do next.” |
The table above shows the two most distinct tone options. Persuasive and Concise fall between these extremes. Choose Persuasive when you need emotional impact. Choose Concise when you need direct, no-filler text.
Next Steps After Rewriting Your Document
You can now rewrite any Word document in a tone that fits your audience — professional for clients, casual for teammates, persuasive for proposals, or concise for summaries. After rewriting, use Copilot’s “Summarize” feature to create an executive summary of the revised document. Open the Copilot pane and type “Summarize this document” to get a one-paragraph overview. For documents longer than 10 pages, ask Copilot to “Generate a table of contents” to improve navigation.