ITP will display a Key selection window when running an ITP Model in which a main Entry is used that has Formal parameters for which no values are specified. ITP will at least display the actual values of the Formal parameters in this window. On the "Work with Entries" panel, additional fields that will be displayed in the Key selection Window can be registered.
Before actually generating the data retrieval program or downloading the DID to the PC the Screen fields must be registered using option "36=Screen fields" on the "Work with Entries" panel. Registering is simply adding a sequence number for the Field on the "Seq. numbers screen fields PGM key retrieval" panel.
The Key selection window that is displayed on the PC while running the ITP Model displays the actual values of the Formal parameters supplemented with the values of the registered Screen fields.