Selects the primary output buffer as the active output buffer.
STOFF
ST OFF
The stack can be turned on (STON) or off (STOFF) at any point within a jCL program.
At the start of a jCL program or after execution of an RO or P command, both output buffers will be empty, and the stack will be off.
When the stack is off, H commands will place their data in the primary output buffer.
JCL