Unable to add " radio buttons ", " checkboxes " and " selects " to Contact Form on Web Presence Builder.
Web Presence Builder 11.5 supports only additional fields in the Contact Form. For more details refer to Web Presence Builder User's Guide (Page 31)
" radio buttons ", " checkboxes " and " selects " in Contact Form are not supported in Web Presence Builder at the moment. You may want to suggest new functionality in Plesk on Plesk User Voice portal.
The top-ranked suggestions are likely to be included in the next versions of Plesk. You can get the information about the updates in our products in the following public sources: