WCOM > Advanced Settings > Styles section gives you options do basic styling options without writing custom CSS style rules.
This setting is shared among following plugins.
- WHMCS Client Area (API) – WCAP
- WHMCS Cart & Order Pages – WCOP
WHMCS offer TLD specific custom domain fields. These fields represent a maximum set of fields and not all fields are always required to register a domain.
In WHMCS, you need to edit the file to remove the fields that you do not need, which can be a daunting task. Here you can simply click to disable any such fields.