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Using ChatGPT Canvas to improve existing writing inline
Executive overview
Editing existing writing in ChatGPT used to mean wrestling with markdown or HTML to distinguish original text from suggested changes. Canvas solves this with inline comment suggestions — highlights show exactly what changes, with a one-click apply per edit.
Inline comment editing makes iterative writing improvement fast and precise.
How to use Canvas for writing improvement
- Open ChatGPT, select the Canvas tool from the toolbox
- Paste your text plus a prompt specifying the improvement goal (e.g. simpler, fifth-grade reading level)
- Instruct the model to use Canvas inline comments and apply changes without asking for approval
- Canvas opens alongside your text; the model rewrites it and annotates suggested edits as highlighted comments
- Each comment shows the original phrase, the suggested replacement, and an apply button
- Clicking apply rewrites that block inline — no copy-paste or diff-reading required
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