Sorry I didn’t explicitly state my needs correctly. I need to programmatically add CSS Classes to groups / pages (and other non-input elements). In order words, I want to decide at run-time which classes to add, in order to style the elements differently depending on different logic. I know this can be done for input elements by using the quform_field_classes_elementID filter, but this is not implemented for non-input elements. Can this be implemented?