Selective Prompting for CL Commands:

You can request to prompt for selected parameters within a command. This is especially helpful when you are using some of the longer commands and do not want to be prompted for certain parameters.

Selective Prompting Character Description
?? The parameter is displayed and input-capable.
?* The parameter is displayed but is not input-capable. Any user-specified value is passed to the command processing program.
?< The parameter is displayed and is input-capable, but the command default is sent to the CPP unless the value displayed on the parameter is changed.
?/ Reserved for IBM use.
?– The parameter is not displayed. The specified value (or default) is passed to the CPP. Not allowed in prompt override programs.
?& The parameter is not displayed until F9=All parameters is pressed. Once displayed, it is input-capable. The command default is sent to the CPP unless the value displayed on the parameter is changed.
?% The parameter is not displayed until F9=All parameters is pressed. Once displayed, it is not input-capable. The command default is sent to the CPP.


Example

OVRDBF ?*FILE(FILEA) ??TOFILE(&FILENAME) ??MBR(MBR1)

Above. You can see the FROM file name but cannot change it but both TO file and MEMBER may be changed.