Stopping a Component
A component can be stopped any time that it is running. A component is stopped by right-clicking on the component and clicking Stop from the context menu, or by selecting the component and clicking the Stop button ( ) in the Operate Palette.
If a Process Group is stopped, all of the components within the Process Group (including child Process Groups) will be stopped.
Once stopped, the status indicator of a component will change to the Stop symbol ( ).
Stopping a component does not interrupt its currently running tasks. Rather, it stops scheduling new tasks to be performed. The number of active tasks is shown in the top-right corner of the Processor