Pageflex jobs may contain multiple templates but should have only one project file. Although the uDesignIT! training video shows one business card template to be used as the onscreen proof as well as the production file (PDF), in reality it's possible you'll have separate Pageflex Studio templates for the preview image and the production file. As an example, it may be common to want the production file to contain black text rather than the spot color that will print - but keep the spot color for the preview JPG and proof PDF. In such a situation you should consider creating two separate templates and assign one of them to your preview JPG and proof PDF, and the other for the production PDF.