> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainlit.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

The `.chainlit/config.toml` file is created when you run `chainlit run ...` or `chainlit init`. It allows you to configure your Chainlit app and to enable/disable specific features.

You can also dynamically override specific `config.toml` variables by Chat Profile at runtime. See [Dynamic Profile-based Configuration](/api-reference/lifecycle-hooks/on-profile-switch) for details.

It is composed of three sections:

<CardGroup cols={2}>
  <Card title="project" icon="rocket-launch" color="#ea5a0c" href="/backend/config/project">
    Project configuration.
  </Card>

  <Card title="features" icon="flag" color="#0285c7" href="/backend/config/features">
    Enable/disable features.
  </Card>

  <Card title="UI" icon="palette" color="#16a34a" href="/backend/config/ui">
    UI configuration.
  </Card>
</CardGroup>