Hi there!

Thanks for your query.

Yes, you are right, there is no "Form field inline" option in the Form Builder addon as the Opt-in form has https://prnt.sc/26it3qw.

But you can control the width of your input fields as follows:

https://prnt.sc/26isvq3

https://prnt.sc/26isw69

However, if you want you can use a simple custom code in your custom CSS:

.sppb-addon-form-builder-form {
    flex-wrap: nowrap;
}

This will give you a horizontal inline form.

Note: Path towards custom CSS: Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.

Best Regards