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

# Theme

> Choose light, dark, or system appearance from profile settings.

## Open the setting

Go to your profile and select **Settings**. The **Theme** area offers three choices.

<Frame caption="Chinese UI screenshot: theme settings">
  <img src="https://mintcdn.com/xunmee/KrVlVFGhu4wEu68R/images/player/profile-theme.png?fit=max&auto=format&n=KrVlVFGhu4wEu68R&q=85&s=bb9d92f9cd86442a31237200884e55dc" alt="Profile settings with light, dark, and system theme choices" width="1180" height="115" data-path="images/player/profile-theme.png" />
</Frame>

* **Light** uses a light page.
* **Dark** uses a dark page.
* **System** follows the device appearance setting.

Select an option and open another page to confirm the result. System mode is useful when your device appearance changes automatically.