What Are Printer’s Signatures?
It is helpful to have insight into how commercial printers use "signatures" when they lay out large press sheets for booklets and books. Customers and designers have no responsibility for the creation of signatures (layouts) that will be used in the printing process. The printer’s powerful prepress software takes care of it. With today’s technology, almost all commercial printers want files submitted as single pages with bleeds set, and their sophisticated imposition programs take it from there.
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