# Write your own system prompt. Dimmy Help.

> Write your own system prompt. Step-by-step help for Dimmy, the native voice dictation app for macOS, Windows, and Linux.

Source: https://dimmy.app/help/custom-prompts/

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AI Styles & Tones

# Write your own system prompt

Pick the Custom style and paste any system prompt. Dimmy uses it for every dictation until you change it.

1. Open Settings → Output.
2. Pick the Custom style.
3. Paste your system prompt in the box below.
4. Save. From now on every dictation goes through your prompt before being pasted.

## Example prompts

text

`You are a copy editor. Fix punctuation and grammar without changing the meaning or the voice. Keep contractions. Do not add or remove sentences. Output the rewritten text only.`

text

`Rewrite the input as a code comment. Use imperative tone. Wrap lines at 80 columns. Output the comment block only, including comment markers for the surrounding language.`

text

`Translate the input to French. Keep proper nouns. If the input already is French, leave it unchanged. Output the translation only.`

tip

End every system prompt with Output the rewritten text only. or similar. Otherwise the LLM may add explanations that get pasted into your text.

## Variables

Custom prompts can include {{tone}} as a placeholder. Dimmy replaces it with the selected tone before sending. Lets you reuse the same prompt across tones.

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## In this category

[ AI Styles & TonesThe 13 AI stylesAfter transcription, an optional LLM pass rewrites your text. From Correct to Imbruttito, with 11 styles in between.](https://dimmy.app/help/styles/) [ AI Styles & TonesCommand Mode: speak instructions, not textSelect text and say what to do with it. Or, with nothing selected, ask Dimmy to write something at the cursor. The AI does the rest.](https://dimmy.app/help/command-mode/) [ AI Styles & TonesThe 5 tonesNone, formal, friendly, concise, academic. The tone sits on top of the style and changes register only.](https://dimmy.app/help/tones/) [ AI Styles & TonesStrip filler words automaticallyDimmy can drop "um", "uh", "basically", "cioè" before paste. Works in 6 languages, independent of the LLM pass.](https://dimmy.app/help/filler-removal/)

Last updated: 2026-05-22

On this page

1. [01 Example prompts](#example-prompts)
2. [02 Variables](#variables)