Click one or more buttons on the list
in the Options area (Initial, Repeat, and Return).
Asynchronous monitors are event-driven, not polled. They generate messages as
events occur. Therefore if the resource is an asynchronous monitor,
the values in the Options area defaults to Repeat and cannot be changed.
This Options area does not display if you have selected When value changes or At each interval from the list in the Notify area. In these cases the options default to Initial
and cannot be changed.