Job lines can be added to a job from a supplier invoice that isn't related to a purchase order.  The job number, cost and rate can all be set in the supplier invoice.

Job lines are only added to the job when the Supplier Invoice is Posted.  

Job lines can be added to open and closed jobs.  Closed jobs are controlled by a system setting.

You will be able to edit the rate and discount % on the job line, you can't delete the line that has come from a supplier invoice but can reverse the line and assign to another job.

We are looking to build a transfer function in the future.

A hover message is displayed showing the reason why you can't edit other than the Rate and the Discount.

You can mark the line as Approved or Non-billable.