> ## Documentation Index > Fetch the complete documentation index at: https://docs.ocoya.com/llms.txt > Use this file to discover all available pages before exploring further. # Edit a caption with AI > Select any part of a caption and have Ocoya rewrite, shorten, expand or translate it. You don't have to generate a whole post to use AI on it. Select any part of a caption you've already written and Ocoya can rework just that part, leaving the rest alone. This works the same whether you wrote the caption by hand or generated it. ## Use it Select some text in the caption, then choose an action from the AI menu that appears. Ocoya replaces the selection with what it returns — the rest of the caption is untouched. Each action costs **1 credit**. See [What are credits?](/help/credits) ## The actions | Action | What it does | | --------------------------- | -------------------------------------------------------------------------------------------- | | **Write from instructions** | Treats the selected text as a brief rather than as copy, and writes the caption it describes | | **Fix spelling & grammar** | Corrects mistakes without changing the meaning | | **Rephrase** | Rewrites the selection, keeping the same meaning | | **Shorten** | Cuts it down while keeping the main message | | **Expand** | Adds useful detail | | **Emojify** | Works emoji into the text | | **Translate** | Translates the selection into another language, picked from a submenu | **Write from instructions** is the one people miss. Instead of selecting a sentence to improve, you type what you want — one instruction per line — select those lines, and Ocoya writes a caption section for each one, in order. It's the fastest way to get structure into a long caption. ## Translating a caption Translate sits in its own submenu with the language list. Ocoya detects the language your caption is already in — the editor shows it next to the post score — so the language you're translating from doesn't need choosing. A common pattern for multi-market brands: write the caption once, then use [per-channel captions](/help/ways-to-create-a-post) to hold a translated version for each market's channel, rather than creating a separate post per language. ## Fixing what the post score flags The AI menu also carries a **Fix** action for each failing item on your post score, labelled after the item — *Fix: Opening line gives people a reason to stop*, and so on. These are narrower than the general actions: each one is told to change only what that check measures and to leave everything else verbatim. See [Post score](/help/post-score) for what each check looks at. ## When it doesn't help AI editing works on wording. It cannot fix a caption that has nothing to say — expanding a thin sentence gives you a longer thin sentence. It also writes from your brand description, so if the tone comes back wrong across every action rather than on one, the brand profile is the thing to change. See [Set up your brand](/help/set-up-your-brand). ## Related Writing by hand, drafting from a prompt, or generating a campaign. Each AI edit costs one.