Function calls are selected in the Action field. These are either
-> Standard Menu Userexits or
-> Event Macros. Userexit calls are for instance used if you want to additionally provide frequently used menu or button functions as key functions in masks for experienced users. Please note that most standard menu userexits require parameters to be passed in the Parameter field. Event macros are primarily used to control cursor movements or execute edit functions in Mask-Edit state (MAS). When calling userexits and event macros you should make sure that the function is useful in the selected system state and that it can trigger different actions in different system states.