Hinge Cover Setup Guide
When hardcover books are produced, there’s a small indentation on the front and back cover that helps the book open without causing damage to the covers or spine. This area is called hinge.
In order to accommodate for the hinge, you’ll need to allow for 0.4 inches additional on both the front and back cover, as you can see in our hardcover artwork setup guide.
In general, most designers keep important graphical elements out of the hinge, since the hinge will shrink and contract in the hardcover binding process.
It’s usually better to keep text elements such as your title out of the hinge, since elements that run into the hinge may change proportion somewhat due to its concave shape. You’re better off centering these objects starting from the edge of the hinge instead.