You can add the following types of custom fields. With the exception of primitive custom fields, you configure custom fields on the Real User Analyzer. You can configure primitive custom fields on the Real User Collector only. To perform this procedure, you must have Operator-level access, or higher.
After you have added a custom field to the system, configure extraction rules for this field.
Default settings for custom fields
Maximum number of user-defined custom fields per object or page
Maximum number of user-defined custom fields enabled simultaneously per object or page
Maximum number of characters per custom field
Maximum number of extractions per custom field
Final output size limit