Scheduler Configuration allows administrators to manage scheduled system jobs. Access Scheduler Configuration from the System Administration page. The Scheduler Configuration screen is shown below:

Use the (A) Schedulers drop down to select from system schedulers. There's also an option to (B) Remove Scheduler if needed:
All currently allowed jobs are listed under Allowed Jobs. This list includes the Job Name, if this Is System Job, the current configured number of Instances, and an option to Remove listed jobs
Follow the steps below to add new jobs to the Allowed Jobs list:
To add new jobs to the list, use the drop down menu beside the Add New Jobs button and select jobs to be added by marking the checkbox next to the job(s) you'd like to add.
When the jobs are selected, click Add New Jobs to add these to the list:

Review the details, then click Save to save your changes.
The jobs are added to the list. Click the red X next to a job to Remove the job. A confirmation appears.
Click OK to remove the job.