Multiple choice technology programming languages The standard function key used for displaying a list of possible values is: F1 F2 F3 F4 Reveal answer Fill a bubble to check yourself D Correct answer Explanation F4 is the standard SAP function key for input help (search help) that displays a list of possible values for a field. F1 is for help, F3 is for back/exit, and F2 has various context-specific uses.