Instead of using the Subcommand function key to run a subcommand, you can switch to subcommand mode to enter it. To switch to subcommand mode, press the SubCmd function key when the shell command line is empty. In subcommand mode, the screen appears as it did in the shell, except that in the lower right-hand corner the status displayed is SUBCOMMAND. Existing output from the shell is displayed at the top of the screen, and any new output is displayed as it is available.

When you switch to subcommand mode, the command prompt changes to OMVS Subcommand ==>.