To add the required style to a CSS file:

1. Edit a CSS file that is referenced by the wrapper of any pages that contain required form fields. Typically, the file is named default.css (or similar) and resides in an /assets folder in Website Explorer.

2. Add the following (or any compliant variation) to the style sheet:

.formWidgetRequired { border: 2px inset red; }

In this example, required fields will display with a red border.

3. Save, upload, and publish the edited .css file as needed.