The ZSHOW command displays information about the current GT.M environment.
The format of the ZSHOW command is:
ZSH[OW][:tvexpr][expr[:glvn][,...]]
The optional truth-valued expression immediately following the command is a command postconditional that controls whether or not GT.M executes the command.
The optional expression specifies one or more codes determining the nature of the information displayed.
A ZSHOW with no argument defaults to ZSHOW "S"; in this case, at least two (2) spaces must follow the ZSHOW to separate it from the next command on the line.
The optional global or local variable name specifies the destination for the ZSHOW output; if the ZSHOW argument does not contain a global or local variable name, ZSHOW directs its display to the current device ($IO).
An indirection operator and an expression atom evaluating to a list of one or more ZSHOW arguments form a legal argument for a ZSHOW.