There are two ways you can customize the use of HELP data. You can set up HELP members so they merge information from other members for display to the user. You can also provide the prompt mode HELP function, which provides help from the HELP data set for a user who omits or incorrectly specifies a positional operand on a TSO/E command. The function provides help when the user requests a second-level message and none are available or all have been displayed. TSO/E, by default, provides the prompt mode HELP function for:

• ALTLIB
• ATTRIB
• CALL
• CANCEL
• EDIT
• EXEC
• HELP
• OUTPUT
• RACONVRT
• RUN
• SEND
• SYNC
• TRANSMIT

For information about customizing HELP processing, see Customizing the HELP data set.