The command line can appear at either the top or the bottom of the screen, depending on the user's ISPF screen display characteristics. From the command line, you can issue any ISPF command, a TSO/E command that is prefaced by “tso”, and the REQAPPC command.

Use the REQAPPC command when the dialog is installed with a level of MVS that is lower than MVS/ESA SP 4.2. REQAPPC ON and REQAPPC OFF control whether you require APPC to syntax check the JCL portion of a TP profile. When a TP profile is added or modified and MVS/ESA SP 4.2 or later has not been installed, the scheduler JCL cannot be syntax checked. To override the requirement for syntax-checked JCL, you can type REQAPPC OFF and the TP profile is added or modified with no syntax checking. The default is REQAPPC ON.