Click 'Live Jobs' from the menu on the left. From here you can pause your role by clicking 'Pause Job’. The job will be moved from 'Live Jobs' to 'Paused Jobs'.
To un-pause a role, go to ‘My Jobs’, click ‘Paused Jobs’ and hit ‘Un-pause Job’.
If you have filled your role or feel like you have a sufficient number of candidates you can pause your job. This allows you to reactivate it at a later stage if the same role or a similar role becomes available, saving you the time of rewriting the entire spec.