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Image: Van de Graaf canon in book design

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Description: The Van de Graaf canon is used in book design to divide a page in pleasing proportions. This canon is also known as the "secret canon" used in many medieval manuscripts and incunabula. The page proportions vary, but most commonly used is the 2:3 proportion. In this canon the text area and page size are of same proportions, and the height of the text area equals the page width.
Title: Van de Graaf canon in book design
Credit: Popularized by Jan Tschichold in his book The Form of the Book in 1975.
Author: jossi
Permission: Public domain
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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