Custom CSS

Classic Campaign Templates

On the Advanced or Power plans, you can access the Custom CSS section to customize your campaign with styles not available by default. In the Design section of your campaign dashboard, click the “Painter’s Palette” icon and then click CSS & JavaScript.

Design - CSS & JavaScript

Then click Custom CSS.

Custom CSS & JavaScript section

The CSS editor will open to the right and you can type or paste your code directly onto the page.

Custom CSS editor with code

Click the Save button to save your changes, or click Revert to clear all coding from the page.

Save and revert buttons for custom code

AI Site Builder

To add custom code or edit the existing HTML in Sites that use the AI Builder, go to the Builder section, and click the </> Source tab. From there, you can select index.html, style.css, app.js.

AI builder custom code section
Updated on April 10, 2026

Was this article helpful?

Related Articles