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Add custom instructions in GPT for Docs

Assign a specific role to the AI in GPT for Docs to define its field of expertise and guide how it generates responses.

  1. In the GPT for Docs sidebar, click Model settings.

  2. Select Custom behavior and enter your own custom instructions, or choose a predefined option from the dropdown.

    Choose Custom behavior in the dropdown to create your own behavior description
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When you select an option from the dropdown, you can modify the predefined instructions.

You can now submit a prompt in the current document with your custom instructions. Once a prompt is submitted, your custom instructions are saved along with all Model settings values, and is used for all prompts executed from Google documents.

What's next

Select other settings to customize how the language model operates.