> For the complete documentation index, see [llms.txt](https://docs.jetadmin.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.jetadmin.io/ai-app-builder/themes-and-appearance/customize-theme-settings.md).

# Customize theme settings

Adjust theme parameters manually when you need a particular visual style. Start from a preset or work with the current settings.

## Change a setting

1. Open **Preview → Theme**.
2. Choose **Light** or **Dark** for the variant you are editing.
3. Find the setting you want to change.
4. Adjust it and inspect the relevant elements in Preview.
5. Click **Save changes** when the result is ready.

![Customize theme panel with light and dark modes, typography controls, brand colors, and surfaces](https://3448227606-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LQ08RFAKZvFADEiXKFy%2Fuploads%2FrRQ4oi3keTBYBrTbYfr8%2F05-theme-settings.png?alt=media)

| Settings          | What to review                                                       |
| ----------------- | -------------------------------------------------------------------- |
| Typography        | Regular, Heading, and Code fonts; letter spacing                     |
| Brand colors      | Primary, Secondary, and Accent colors and their text colors          |
| Surfaces          | Page, card, popup, muted, and error/destructive backgrounds and text |
| Borders and focus | Border color, input border, and focus ring                           |
| Shapes            | Corner radius and spacing                                            |

## Check the result

Use a page with a table and form. Check body text, headings, input borders, keyboard focus, error text, and button labels. Review the other color mode separately.

For a targeted change, modify one group of settings at a time so you can see its effect. If you do not want to keep unsaved theme edits, use **Cancel**.

Next: [Control app Preview](/ai-app-builder/preview-and-troubleshoot/control-app-preview.md).


---

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