The Custom Fields tab lets you add custom fields to forms:
Custom text fields added to the main reservation form. Seven slots are available (Custom field 1-7).
Toggle fields (checkboxes) added to the reservation form. Three slots are available.
Fields with selection from a predefined list of values added to the reservation form. Three slots are available.
Custom text fields added to the delivery form within a reservation. Five slots are available (Custom field 1-5). Unlike the reservation-level fields, these also support a required flag and a multilingual label.
Custom text fields added to the delivery row form. Three slots are available (Custom field 1-3).