By default an added (new) Job is set to active. The "active" status for a Job is indicated by a green (green check icon) while the "deactive" status is indicated by a red (red cross icon) icon in the leftmost part for each specific Job in the Server/Group/Job/Task grid. It is possible to change status in the right-click menu for a Job by the Activate/Daactivate Job '<Job name>' option.
If you look at the Job list for status indication, please note that any Job list column, including the status column, can be set to invisible.
It is also possible to Activate/Deactivate a Task status by right-click on a Task and select the Activate/Deactivate Task '<Task name>' option.