To copy, rename or delete a job you first have to select the job you wish to alter. Once a job is selected the 3 other buttons in the top right of the navigation bar will no longer be grayed out. 

After selecting a job click on the copy button in the top right. This will copy all database connection settings, mappings, and schedules. The only setting that is (intentionally) not copied over is the Next Job for Job Chaining.  Please note that this button is available on the Job List View, not when viewing the details of a Job.  When viewing the details of a Job, you can hover over the Job Name to get to the Copy Job function.

After selecting a job click on the delete (the circled X) button in the top right. A final warning will popup asking "Do you really want to delete this job and all mappings contained within it?"