How to: Modify a Job (SQL Server Management Studio)
This topic describes how to change the properties of Microsoft SQL Server Agent jobs.
In Object Explorer, connect to an instance of the SQL Server Database Engine, and then expand that instance.
Expand SQL Server Agent, expand Jobs, right-click the job you want to modify, and then click Properties.
In the Job Properties dialog box, update the job's properties, steps, schedule, alerts, and notifications using the corresponding pages.
Unless you are a member of the sysadmin fixed server role, you can only modify jobs that you own.