> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.useapprentice.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Using Custom CSS (Advanced)

The Appearance editor includes a Custom CSS field for your public page.

1. Open **More → Public Page → Appearance → Edit Branding**.
2. Expand **Fine-tune with custom CSS**.
3. Read the restrictions beside **Custom CSS**, then enter your styles. Keep a copy of your original CSS before editing.
4. Choose **Save Branding** and reload to confirm the saved text.
5. Inspect your public page before sharing the change.

Follow the restrictions shown beside the field and stay within its 10,000-character limit. If a change looks wrong, restore your previous CSS and save again.

![Custom CSS field in the Appearance editor.](https://storage.crisp.chat/users/helpdesk/website/-/b/6/b/f/b6bf11da1ce5e000/using-custom-css-advanced-step_14nggit.png)