Give a name to your global custom field. Depending on list settings this name can be displayed on the subscriber area or publicly.
Choose the field type from one of the options in the list.
Set a default value for the custom field. It can be empty.
Merge Tag Code
Set a merge tag code. This code will be used as merge tag in email contents. For example, if you set this code to “FirstName”, you will be able to insert the value of this global custom field into email contents using %Subscriber:FirstName%. Merge tag codes shouldn’t include spaces or special characters.
If this feature is enabled, during lead generation form submission, the entered value will be validated.
You can set the visibility of this global custom field with this option. It can be only displayed to users or to subscribers and users.
Check “Make this field mandatory to fill in” if you want to force your users (or subscribers) enter a value for this global custom field during the subscription process.
Check “Force unique value entry” option if you want to force your users (or subscribers) enter a unique value for this global custom field during the subscription process.