For UBO or desktop (Java) version, refer to this link.
Set up Custom Fields to track all types of subscriber data that do not have corresponding default VISP fields. You can hide fields, select formatting, choose display color, set data type, rename the field or restrict viewable data to certain staff.
For example, you could add an important subscriber reminder such as, “Works nights. Do not call before 3 PM”. You can then display that reminder in the main table in bold and red using the custom fields feature.
There are two types of custom fields: Primary Custom Fields and Additional Custom Fields. The difference between both field types is that Additional Custom Fields can be hidden in your subscriber’s Primary Account Tab. Only the Primary Custom Fields can be displayed as columns in the main table.
To add or edit custom fields, go to Main Menu > Custom Fields. You can do any of the following:
To modify the application users who should see the hidden custom fields, go to Main Menu >Users > Appuser Name > AppUser Rights and check the View Hidden Characters in Custom Fields checkbox.