Fields can be hidden/disabled from appearing in Infoplus. For example, if you're a 3PL and you don't want to see the freight field on an order, this field can be hidden. Once it's hidden the field will no longer appear when viewing an order. Also, after a field has been hidden, it will always return as "null" when pulling data from Infoplus using the API.
Please contact Infoplus Support for more information. When contacting support, please include the field you want to hide and which table it's located in.