If you have developed your own detail screens, you can include them in this work step.
You require the report program number and the screen number of the detail screen. You should use a sequential number larger than 900 for the detail screen. The number ranges before are reserved for SAP.
You can select the included detail screens in the work step "Define layout of WBS element detail screens". You can also select these detail screens in the application during maintenance of the user-defined layout.