The Primary File Format tab provides options for defining the file format of the published report that will be stored in the content server. The options include specifying the appearance of the report output, such as header, body, page setup, and so forth.
The Alternate File Format tab provides options for defining the secondary file format for the published report. The Alternate File is specified only if you want to check in another file format in addition to the Primary File Format specified. As with the Primary File, the options for Alternate File Format include specifying the appearance of the report output, such as header, body, page setup, and so forth.