Use ZSHOW as
a debugging tool to display information on the environment.
an error-handling tool to capture context information after an unpredictable error with output directed to a sequential file or a global.
part of a context-switching mechanism in a server program that must manage multiple contexts.
a development tool to determine the ZCALL table entries available from the current image.
To prevent confusing data interactions, avoid directing ZSHOW output into variables holding other kinds of information and directing ZSHOW "V" output into local variables. For a comparison of ZSHOW "V" and ZWRITE, refer to the ZWRITE section in "Commands".