If you've reached this page, it means you have configured a business view on your messages which we call Documents.
For example, you can have here the list of your invoices, with fields like Amount, Currency, DueDate, Recipient, ...
You can fully configure the type of documents that you want to use, and all the fields that you want to have. This can be done in the admin section.
You can configure different document types. To do so, you must first:
Configure your DocumentTypes in the admin section (which DocumentType do you want? With which fields? ...)
Extract business information from your messages, by using ExtraProcessing "Extract documents" on your MessageDefinitions.