Retro1.org codex

RO                                                        CMS Immediate command

Use the RO (Resume tracing) immediate command, during the execution of a
command or one of your programs, to resume the recording of trace information
that was temporarily suspended by the SO command.  Program execution continues
to its normal completion, and all recorded trace information is spooled to the
printer.  The format of the RO command is:
+----------+------------------------------------------------------------------+
| RO       |                                                                  |
+----------+------------------------------------------------------------------+

You can issue an Immediate command only after causing an attention interrupt by
pressing the Attention key (or its equivalent).  The command is processed as
soon as it is entered.  It is also executed immediately when stacked in an EXEC
procedure.  Any program execution in progress is suspended until the Immediate
command is processed.