To hide form fields, go to the Form Editor, click on the field that you want to hide and, in its Edit Field panel, tick the box Hidden. Although still visible in your Form Editor, hidden fields can’t be seen by form users.
This feature is especially useful when combined with the prefilled form fields feature. They allow you to receive reference information in form submissions and to keep this information hidden from users.
Read more about how to set up prefilled hidden fields.
Tip: Use hidden fields with conditional form logic. If hidden fields are shown by a rule, the form’s loading time will speed up. Furthermore, add a page break field on the form for a better performance. For branching and conditional logic, set up field rules in the Settings → Rules → Field Rules section.