On the "Jobs tab" of every project, you may coordinate the assignments to your vendors:
It normally works like this:
1. You create a job:
select the files, assign the job to the vendor, enter payables and press "Start job":
2. Your vendor gets the email with assignments logs into the system and accepts the job.
3. The system notifies you when the vendor finishes the job, and you can accept it and use the file he uploaded.
For more detailed info on jobs assignments, please see our wiki pages or a special video tutorial