RE: Marketing Form Fields - Not All Fields Available in Designer Toolbox
Hi Mary,
For a form field record, if it has been mapped to a lead field but not mapped to a contact field,
then this field won't appear when Update contacts/leads field is set to "Only Contacts".
(Existing Company Name field would be an example when only contacts form)
Try to Update both contacts and leads to show all fields,
total: added fields on form + remaininng fields in Fields section + Remember Me + Do Not Email
There are 25 active fields by default in my environment.
So 25 = 3 + 10(rows) x 2 + 1 + 1

Regards,
Clofly