The job merge feature superimposes one job on top of another. One master job provides the background image for multiple content jobs.
The page size, background color, and file extension of master and content jobs must meet the following requirements:
Master and content jobs must have the same page size within 0.1 inches (2.54 mm).
The background color of the content job must be 100% transparent.
Master and content jobs must have the same file extension.
If the content job is a multi-page document, Command WorkStation applies the master job to all the document’s pages.
If the content job has layout settings (rotation, scaling, etc.) or crop marks, Command WorkStation transfers them to the merged job. Color management settings are not transferred.
Now watch the video here.