You can repost a non-posted job that was previously posted. Select the non-posted job you want to repost from the list of jobs on the Jobs tab, then choose the Post Job option from the Change Status pull-down menu.

Reposting each job uses one job post, unless you are posting to multiple locations using a job slot.

When you repost a job, you can choose whether you want to combine the candidates from the previous posting with any new candidates that apply to the reposted job, or keep the two candidate pools separate.