This is the Van de Graaf page construction [url=https://en.wikipedia.org/wiki/Canons_of_page_construction]canon[/url], as popularized by the designer [url=https://en.wikipedia.org/wiki/Jan_Tschichold]Jan Tschichold[/url]. Here it is applied to A4 paper.[br][br]For a right-hand page, the margins are given by:[br][list][br][*]left - EO[br][/*][*]top - OI[br][/*][*]right - KP[br][/*][*]bottom - KQ [br][/*][/list]While this is a very pleasing construction, the resulting proportions aren't very complicated. For all margins, the smaller is [math]\frac{1}{9}[/math] of the dimension, the larger is [math]\frac{2}{9}[/math].

To adjust the margins for other page sizes, change the coordinates:[br][list=1][br][*]A is (0, [i]Page Height[/i])[br][*]B is (2 × [i]Page Width[/i], [i]Page Height[/i])[br][*]C is (2 × [i]Page Width[/i], 0)[br][*]D is (0,0)[br][/list]