BEA SWIFT Adapter - Manual (Page 85)

Swift User Message (Data)
The External Format - SWIFT User message (Data) UI looks as below. The
message format is shown in the table at the top, and a panel at the bottom shows
the properties of the row selected in the table. The properties panel dynamically
changes as the row selected in the table changes.
The message format (ie, the fields) is automatically populated when created from a
pre-defined format. Only the optional fields can be enabled or disabled in this case.
Whereas, the table is blank when created from an empty message format and the
tool bar buttons are enabled so as to add, modify and move the fields as required. In
this case, there is no need for the Enabled column in the table and the properties
panel, unlike the previous case, as the user adds the fields as and when required.