F4 Help

You can choose F4 to display possible input values. You can also call up the F4 help for a field using the button immediately to the right of the selected field. If a field contains a checkmark symbol, you can only proceed to the next step in that application after entering a permitted value (required entry). You can use transaction or screen variants, or Customizing to mark fields as mandatory or optional, hidden or filled with hidden standard values. The F4 help displays a list of possible entries for a field. If there are a large number of possible entries, a separate selection screen is displayed. If there is a long hit list, the F4 help only displays as many entries as the user has specified on the F4 Help tab page under Help → Settings. The default value for the maximum number of displayed hits is 500. Take the time to familiarize yourself with the other settings you can make here.