Registration page - make some fields non-editable

I have custom fields on the registration page for first_name, last_name, and email. These 3 fields are all mapped to their corresponding CB fields. On the registration page the fields are filled in correctly but they are editable. How can I make these fields non-editable? Thanks!

Hi Michael

Try to edit these custom fields, in the Extra Attribute property, try to enter readonly and it shoud work well

Tuan