The options on the Steps page of the Execute Job window determine which steps adTempus will run.
Run the job from the beginning
The job will run as normal, with all steps executed.
Run the job from the specified step
Execution will begin with the selected step and continue to the end of the job. If you check Run only the selected step, the job will end after the selected step is run.
Run only the selected steps
Only the steps you select will be executed. Steps will be executed in their original order (as listed here), but you may skip steps.