In this doc, we'll show you How to Create Custom Fields in Ontraport. There are a few additional steps to complete as well -
How to Create Custom Fields in Ontraport
1. In the navigation, go to Contacts > Settings, and then click on Field Editor:
2. Click on Add Field under Contact Information:
3. Enter 'deadlinetext' as the field name and select 'Text' as the Field Type and click Save:
If you have any questions, please let us know at firstname.lastname@example.org.