Divi Toolbox ➜ Modules ➜ Slim Inline Email Optin
To change the default Email Optin module into a slim version, navigate to the module’s Settings → Advanced tab → CSS ID & Classes → CSS Class, and add one of the following CSS classes:
- slim-optin1 – for optins with a single email field.
- slim-optin2 – for optins with two input fields: name and email address.
- slim-optin3 – for optins with three input fields (eg. first name, last name, and email address).
See the demo page here.