Creep occurs in booklets with saddle binding or nested saddle binding printed on heavy media, or with a large number of pages.

As the sheets are folded to create signatures (folded sheets that form the pages of a booklet), each fold causes a small incremental shift in the location of the page content. The result is that the outer margins become narrower toward the center of the booklet when the booklet is trimmed. The page content may be clipped or finish up printed too close to the outer edge.

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Creep