A digital magazine server creates a section of a digital magazine including content items based on a page template describing the relative positioning and sizing of content items. A page template may include display regions specifying the size of content items as a percentage of a display area. Additionally, a display region in a page template may specify use of a sub-template for presenting content items. The sub-template includes display regions specifying the relative positioning of content items presented in the display region specifying use of the sub-template. To generate the section of the digital magazine, various page templates are scored and a page template is selected based on the scoring. One or more diversity policies may be enforced when selecting the page template to improve user interaction with the digital magazine.