Sometimes you may find yourself in a situation where you have a purchase order that either isn't linked to a job, or is linked to the wrong job and needs to be re-assigned to a different one. Now that's easy!
Step 1)
Open the purchase order and click the edit button near the top.
If it is already linked to a job, it will display that job's ID instead of saying 'No Job Linked'
Step 2)
A dialog window will appear. Enter the Job # of the job you would like to link to the purchase order.
Step 3)
Assign each purchase order item to an item from the job using the dropdown menus
All done! Don't forget to save!