When you print a job, the job name is created in the application. The job name is displayed in the [Job name] field. To rename the job:
Touch [Jobs].
Go to the location of the job.
Select the job you want to rename.
Touch [Edit], or double-tap the job.
In the job window, touch [Job name].
A keyboard appears.
Touch 'Backspace' until the current name is deleted.
Touch the characters to enter a new name.
Touch [OK].