VPS (Variable Print Specifications) is a PostScript language extension, created and maintained by Creo.
It allows PrintShop Mail to classify each element on a page as either reusable (occurring more than once) or inline (occurring only once). This distinction allows the VPS RIP to decide when image data can be reused. This avoids unnecessary repeated processing and speeds up the print process.
One of the main differences between Optimized PostScript and VPS is that VPS re-uses rasterized data instead of PostScript.
Use Automatic Picture Replacement: Automatic Picture Replacement (APR) allows you to speed up the printing process by using the image substitution capabilities of your VPS RIP. The image format support of APR is limited to EPS, but some RIP versions support other formats like TIFF and JPEG.
While previous versions of PrintShop Mail gave the option not to generate booklets, this has been removed since version 7.0 because it caused the output not to be valid according to Creo.