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ChatGPT Writing Block Complete Guide — Polish Emails, Blog Posts & Social Content In-Chat

ChatGPT's 'Writing Block' is an inline editable draft area that replaced Canvas in May 2026. Available on all plans including free, it lets you edit text directly, rewrite selected portions, and even send emails to Gmail without leaving the chat.

2026-09-234 min readSource🇯🇵 日本語版
ChatGPTWriting BlockCanvasEmail DraftingContent WritingOpenAI

"ChatGPT wrote me a great email, but the opening line feels a bit off…" Sound familiar? Today's ChatGPT has a feature called the Writing Block that lets you fix exactly that — right inside the chat window. From email drafts to blog posts and social media content, here's everything you need to know to get the most out of it.

What Is a Writing Block?

In short, it's a dedicated, editable text area that appears inside the chat.

ChatGPT used to have a feature called Canvas — a split-screen panel on the right side of the chat where you could co-edit documents. It was popular, but Canvas was retired in May 2026.

Writing Blocks are its replacement. Instead of a side panel, an editable draft area now appears inline within the chat — seamlessly integrated into the conversation flow.

重要

Writing Blocks are available on all ChatGPT plans, including the free tier. No special settings or paid upgrades are required to start using them.

Canvas vs. Writing Block

以前

Canvas (until May 2026)

Split-screen layout with a dedicated editing panel on the right. Required switching attention between the chat and the editor. Limited model support — less accessible on free plans.

現在

Writing Block (current)

Editable draft area appears directly inside the chat window. Feels like a natural extension of the conversation. Available on every plan, including free.

What Can You Do With It?

① Click to Edit Directly

When a Writing Block appears, you can click anywhere in the text and start typing — just like a simple text editor. No copy-pasting required for small fixes.

② Ask AI to Rewrite Only a Selected Section

The biggest advantage of Writing Blocks is partial rewrites. Simply highlight the sentence or paragraph you want changed, then type your instruction — "make this more casual" or "shorten this." Only the selected text is rewritten; the rest stays exactly as it was.

For example: ChatGPT drafts an email, but the closing feels too formal. Highlight that one sentence, type "make it warmer," and it's done — without touching the rest of the email.

③ Send Emails Directly to Gmail (Paid Plans)

From June 5, 2026, you can send emails directly from a Writing Block to Gmail or Outlook — without leaving ChatGPT. Draft, review, and send, all in one place.

Direct Email Sending Requirements

Gmail and Outlook direct sending is available on Plus, Pro, Team, and Enterprise plans only. Free users can draft and edit text in Writing Blocks but won't see the send button. Also, direct sending currently works on the desktop web browser only.

Real-World Use Cases

Work Emails — Professional Without Being Stiff

Ask: "Write a thank-you email to our client after today's meeting." ChatGPT produces a draft in a Writing Block.

If the closing line sounds too stiff, highlight it and type "make this a bit warmer." Only that line changes — the rest of the email is untouched. This saves far more time than rewriting the whole thing from scratch.

Blog Posts — Beat the Blank Page

Ask: "Give me 3 different opening lines for a blog post about AI tools for freelancers." Three options appear in a Writing Block.

Pick the one that resonates, add your own voice, and you're writing. Many writers find that seeing concrete options breaks through the mental block of starting from nothing.

Social Media — Hit the Right Tone and Length

Ask: "Summarize this blog post as an X (Twitter) post under 140 characters." A compact draft appears instantly.

From there: "Make it more conversational," "Add an emoji," "End with a question" — fine-tune until it's exactly right.

ヒント

When creating social posts, try asking for 3 variations at once. Comparing options side-by-side makes it much easier to choose the tone you want.

How to Get Started

No setup required.

  1. Open ChatGPT at chatgpt.com
  2. Ask for any writing task — "Write an email to reschedule our meeting"
  3. ChatGPT responds with a Writing Block containing the draft
  4. Click to edit directly, or highlight text and ask for targeted changes

To use the text elsewhere, click the Copy button in the top-right of the block and paste it wherever you need.

Pricing

Free
Free
  • ✓Create and edit text in Writing Blocks
  • ✓Partial rewrites by selecting text
  • ✓Copy to use in any app
  • ✓Daily usage limits apply
Plus
$20
/month
  • ✓Everything in Free
  • ✓Direct send to Gmail & Outlook
  • ✓Access to latest models (GPT-6 Astra)
  • ✓Much higher usage limits

Start with the free plan to get comfortable with the "draft and refine in chat" workflow. Upgrade to Plus when you want direct email sending or higher usage limits.

Summary

ChatGPT's Writing Block lets you polish AI-generated text without starting over. The ability to rewrite just one selected part is the killer feature — keeping your overall structure intact while perfecting the details.

Writing Blocks are great for:

  • People who agonize over every email they send
  • Writers who know what they want to say but struggle with the opening
  • Anyone who finds raw AI output "almost right, but not quite"

For the official usage guide, visit the OpenAI Help Center.

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