In general, the pages are organized in the following way: Vredeman de Vries puts descriptive text on the left side, spanning the entire page in two columns. The text is headed (not columned) by a chapter title (one of the orders) in captions, with a subtitle further elaborating the order. Then, in italics, slightly larger font than the subtitle, a dedication to certain people. The chapter then starts with an drawn initial cap. Paragraphs within the chapter are introduced with a centered subtitle in slightly larger font, to then start the paragraph with a bold initial cap. On, pages of text that do not constitute the beginning of a chapter, the two columns are headed by the chapter title in captions.
On the right hand side, Vredeman de Vries adds technical, analytical drawings of the order or views of corresponding facades, spanning the full right-hand page of the spread. The images are neither numbered nor references. This led me to conclude, that they are drawn by Vredeman de Vries himself.
This schema is consistent throughout most of the book. There are 24 full pages of illustrations (including the frontispiece) in total. The total number of pages is 59 (61, if you include the first page with only the title). The book does not have an index or table of contents. With giving text and image one side of the spread each, they are suggested to have an equal amount of weight when studying the five orders.
In his frontispiece (a drawing of a facade icluding a panel, on which the introduction to the book is written), Vredeman de Vries claims the book to have some analytical and academical value in studying the five orders. However, the main objective of the book seems to be to make the theory accessible to craftmanship (he names builders, stonemasons, carpenters and so on, but also lovers of architecture).